Exhibit 10.4
Form 8-K
Viking Systems, Inc.
File No. 000-49636

                        REGISTRATION RIGHTS AGREEMENT


     THIS REGISTRATION RIGHTS AGREEMENT (this "Agreement"),  is made as of March
22,  2005,  by and  among  VIKING  SYSTEMS,  INC.,  a  Nevada  corporation  (the
"Company"),  ST. CLOUD CAPITAL  PARTNERS,  L.P., a Delaware limited  partnership
("St.  Cloud"),  the other Investors who have executed this  Agreement,  and any
other  Person  who may be  added  in the  future  as a party  to this  Agreement
pursuant to the terms of the Securities Purchase Agreement (as defined below) by
execution of the Joinder to this Agreement  substantially  in the form set forth
hereto as Exhibit A or who becomes a Selling  Securityholder  (as defined below)
hereunder.  St. Cloud and the other Investors are at times collectively referred
to herein as the "Investors."

                                   RECITALS

     Pursuant to that certain  Securities  Purchase  Agreement,  dated as of the
date hereof,  and each  amendment,  supplement and addendum  thereto,  among the
Company,  the Lead Lender and Collateral Agent (each as defined therein) and the
Investors (the "Securities Purchase Agreement"),  each of the Investors acquired
a  Promissory  Note and a Warrant to  purchase  shares of the  Company's  Common
Stock, subject to the terms and conditions of the Securities Purchase Agreement.
The parties  wish to set forth  certain  rights of the  Investors  and others in
connection with public  offerings and sales of shares of Common Stock underlying
the Promissory Notes and the Warrants.

     Pursuant to the Securities  Purchase  Agreement,  the Company has agreed to
register the Note  Conversion  Shares (as defined  below) and the Warrant Shares
(as defined below) under the  Securities Act of 1933, as amended,  and the rules
and regulations  thereunder,  or any similar successor statute as each may be in
effect from time to time  (collectively,  the "Securities  Act"), and applicable
state securities laws.

     NOW,  THEREFORE,  in consideration of the premises and the mutual covenants
contained  herein and other good and  valuable  consideration,  the  receipt and
sufficiency  of which are  hereby  acknowledged,  the  parties  hereto  agree as
follows:

                           ARTICLE 1 - DEFINITIONS

     1.1.Definitions.  As used in this Agreement, the following terms shall have
the following meanings:

          (a)  "Business  Day"  means any day other than a  Saturday,  Sunday or
     holiday on which banking institutions in California are closed.





          (b) "Company" has the meaning set forth in the preamble hereto.

          (c) "Company Indemnified Person" is defined in Section 6.2.

          (d) "Claims" is defined in Section 6.1.

          (e)  "Equity  Offering(s)"  has the  meaning  set forth in Section 2.2
     hereof.

          (f) "Exchange  Act" means the  Securities and Exchange Act of 1934, as
     amended,  and the  rules and  regulations  promulgated  thereunder,  or any
     similar successor statute, as each may be in effect from time to time.

          (g) "Investors" has the meaning set forth in the preamble hereto.

          (h) "Investor Indemnified Person" is defined in Section 6.1.

          (i) "Legal Counsel" is defined in Section 3.1.

          (j) "Note  Conversion  Shares" means the shares of Common Stock issued
     or issuable upon the conversion of the Promissory Notes.

          (k)  "register,"   "registered,"   and   "registration"   refer  to  a
     registration  effected by preparing and filing a Registration  Statement or
     Statements or similar  document in compliance  with the  Securities Act and
     the declaration or ordering of effectiveness of such Registration Statement
     or Statements or document by the SEC.

          (l) "Registration Period" is defined in Section 3.1.

          (m) "Registrable  Securities"  means (i) the Warrant Shares,  (ii) the
     Note  Conversion  Shares,  (iii) the Vista  Shares,  and (iv) any successor
     class of common  voting  equity of the Company or other  securities  of the
     Company  issued or  issuable  in respect of the  securities  referred to in
     clause (i),  (ii) and (iii)  above upon any stock  split,  stock  dividend,
     recapitalization,  conversion,  merger,  consolidation,  reorganization  or
     similar event.

          (n) "Registration  Statement" and "Resale Registration  Statement" are
     defined in Section 2.2.

          (o) "SEC" means the United States Securities and Exchange Commission.

          (p) "Securities Act" means the Securities Act of 1933, as amended.

          (q) "Securities  Purchase  Agreement" has the meaning set forth in the
     Recitals hereto.

                                       2



          (r)   "Selling   Securityholder"   means   Vista   and  any   Investor
     participating  in any  registration of Registrable  Securities  pursuant to
     this  Agreement or any assignee  thereof in accordance  with Section 9.1 of
     this Agreement.

          (s) "Violations" is defined in Section 6.1.

          (t) "Vista  Shares" means shares of the Company's  common stock issued
     to Vista  Medical  Technologies,  Inc.  ("Vista"),  on April  15,  2004 and
     re-issued  April 18, 2004,  some of which shares have been  transferred  by
     Vista.

          (u)  "Warrant  Shares"  means the  shares of  Common  Stock  issued or
     issuable upon exercise or conversion of the Warrants.

     1.2.  Capitalized  Terms.  Capitalized  terms used herein and not otherwise
defined  herein shall have the  respective  meanings set forth in the Securities
Purchase Agreement.

                           ARTICLE 2 - REGISTRATION

     2.1.  Registration.  The Company shall register the Registrable  Securities
pursuant to this Article 2.

     2.2 Proposed Equity Offering and Registration.

          (a) The Company  intends to raise,  prior to March 22, 2006, a minimum
     of $4,000,000  (which may be increased) in additional  equity  capital (the
     "Equity  Offering").  The Company anticipates that the Equity Offering will
     consist  of  one  or  more  offerings  that  are  exempt  from   securities
     registration requirements of applicable federal and state securities laws.

          (b) The  Company  shall,  as soon as  practicable  after  such  Equity
     Offering(s) is completed but in no event later than six (6) months from the
     Closing Date, file a registration statement under the Securities Act on SEC
     Form S-3, SB-2 or S-1 or any similar or successor form then appropriate for
     or  applicable  to the offer and sale of the  Registrable  Securities  (the
     "Resale Registration  Statement" or "Registration  Statement").  All of the
     Registrable   Securities  will  be  included  in  the  Resale  Registration
     Statement.

          (c) In the event that Form S-3 is not available  for the  registration
     of the resale of the Registrable  Securities  hereunder,  the Company shall
     (i)  register  the  resale  of  the   Registrable   Securities  on  another
     appropriate  form  and  (ii)  undertake  to  register  the  resale  of  the
     Registrable  Securities  on Form  S-3 as soon  as such  form is  available,
     provided  that the  Company  shall use its best  efforts  to  maintain  the
     effectiveness of the Registration  Statement then in effect until such time
     as a Registration Statement on Form S-3 covering the Registrable Securities
     has been declared effective by the SEC.

     2.3 Other Registration  Rights.  Except as provided in this Agreement,  the
Company has not and will not file (and will not grant to any Person the right to

                                       3



request the Company to register any equity or similar securities of the Company,
or any securities  convertible or  exchangeable  into or  exerciseable  for such
securities) any registration statement prior to the date the Resale Registration
Statement is declared effective without the prior written consent of the holders
of a majority of the Registrable Securities, including the consent of St. Cloud.

                    ARTICLE 3 - OBLIGATIONS OF THE COMPANY

     In connection  with the  registration of the  Registrable  Securities,  the
Company shall have the following obligations:

     3.1. Filing of Registration  Statement.  The Company shall prepare and file
with the SEC the  Resale  Registration  Statement  required  by  Article  2 with
respect to the Registrable  Securities,  and use commercially reasonable efforts
to  cause  such  Resale  Registration  Statement  relating  to  the  Registrable
Securities to become effective within 120 days after such filing, and shall keep
the Resale Registration  Statement  continuously effective and available for use
at all  times,  except  as set  forth  herein,  until  such  date  as all of the
Registrable  Securities  have been sold  pursuant  to such  Resale  Registration
Statement (the "Registration Period").

     The  Selling  Securityholders  shall  have the  right to  select  one legal
counsel (the "Legal Counsel") to review any Resale Registration  Statement.  The
Company  shall   cooperate  with  Legal  Counsel  in  performing  the  Company's
obligations  under the terms of this  Agreement.  The Company shall permit Legal
Counsel  to  review  and  comment  upon  the  Registration  Statements  and  all
amendments and  supplements to the  Registration  Statements  (except for Annual
Reports on Form 10-K,  Quarterly  Reports on Form 10-Q,  Current Reports on Form
8-K and any similar or successor report and registration statements on Form S-8)
at least five (5) Business  Days prior to their filing with the SEC and not file
any document containing  information relating to the Selling  Securityholders to
which Legal Counsel reasonably  objects.  The Company shall (i) furnish to Legal
Counsel, without charge, any correspondence from the SEC or the staff of the SEC
to the Company or its  representatives  relating to any Registration  Statement,
(ii)  promptly  after the same is prepared and filed with the SEC,  notify Legal
Counsel  of the  filing  of any  Registration  Statement  and  any  amendment(s)
thereto,  including  financial  statements  and schedules and all exhibits,  and
(iii) upon the  effectiveness  of any Registration  Statement,  furnish to Legal
Counsel,   without  charge,  one  copy  of  the  prospectus   included  in  such
Registration  Statement and all amendments and supplements  thereto. The Company
shall  reasonably  cooperate  with Legal  Counsel in  performing  the  Company's
obligations pursuant to this Section 3.1.

     3.2.  Amendments to Registration  Statement.  The Company shall prepare and
file with the SEC such  amendments  (including  post-effective  amendments)  and
supplements  to a  Resale  Registration  Statement  and the  prospectus  used in
connection  with the Resale  Registration  Statement as may be necessary to keep
the Resale Registration  Statement  effective and such prospectus  available for
use  at all  times  during  the  Registration  Period  and to  comply  with  the
provisions  of  the  Securities  Act  with  respect  to the  disposition  of the
Registrable  Securities.  The Company shall cause any such amendment  and/or new
Resale  Registration  Statement  to  become  effective  as soon  as  practicable
following the filing thereof.

                                       4



     3.3.  Information.  Upon written request,  the Company shall furnish to any
Selling  Securityholder  and his, her or its legal  counsel,  promptly after the
same is prepared  and publicly  distributed,  filed with the SEC, or received by
the Company,  one copy of the Resale  Registration  Statement  and any amendment
thereto,  and  such  number  of  copies  of  each  prospectus,   including  each
preliminary  prospectus,  and all amendments and supplements  thereto,  and such
other documents as such Selling  Securityholder  may reasonably request in order
to facilitate the disposition of the Registrable  Securities.  The Company shall
promptly  notify  all  Selling  Securityholders  of  the  effectiveness  of  any
Registration Statement or post-effective amendments thereto.

     3.4. Blue Sky. The Company  shall (a) register and qualify the  Registrable
Securities  covered by any  Registration  Statement under the securities laws of
such jurisdictions in the United States as each Selling Securityholder who holds
any such Registrable  Securities  reasonably  requests,  (b) prepare and file in
those jurisdictions such amendments  (including  post-effective  amendments) and
supplements  to such  registrations  and  qualification  as may be  necessary to
maintain  the  effectiveness   thereof  and  availability  for  use  during  the
Registration  Period, (c) take such other actions as may be reasonably necessary
to maintain such  registrations and qualifications in effect at all times during
the Registration  Period, and (d) take all other actions reasonably necessary or
advisable to qualify the Registrable  Securities for sale in such jurisdictions;
provided,  however,  that  the  Company  shall  not be  required  in  connection
therewith  or as a  condition  thereto  to (i)  qualify  to do  business  in any
jurisdiction  where it would not  otherwise  be required to qualify but for this
Section 3.4, (ii) subject itself to general  taxation in any such  jurisdiction,
or (iii) file a general consent to service of process in any such jurisdiction.

     3.5.  Correction of Statements or Omissions.  As soon as practicable  after
becoming aware of such event, the Company shall publicly  announce or notify all
Selling  Securityholders of the happening of any event, of which the Company has
actual  knowledge,  as a result of which  the  prospectus  included  in a Resale
Registration  Statement,  as then in effect,  includes an untrue  statement of a
material fact or omits to state a material fact required to be stated therein or
necessary  to  make  the  statements  therein  not  misleading,  and  shall  use
commercially  reasonable  efforts as soon as possible (but in any event it shall
within three Business Days of the receipt by the Company from its accountants of
financial  information required to correct such untrue statement or omission) to
prepare a  supplement  or amendment  to the Resale  Registration  Statement or a
supplement  to the related  prospectus or any document  incorporated  therein by
reference or file any other  required  document  (and make all required  filings
with the SEC and all applicable  state  securities or blue sky  commissions)  so
that, as thereafter delivered to the purchasers of Registrable  Securities being
sold  thereunder,  such  prospectus  will not contain an untrue  statement  of a
material fact or omit to state a material fact required to be stated  therein or
necessary  to make the  statements  therein not  misleading.  The Company  shall
simultaneously  (and  thereafter as requested)  deliver such number of copies of
such supplement or amendment to each Investor (or other applicable  document) as
such Investor may request in writing.

     3.6. Stop Orders. The Company shall use commercially  reasonable efforts to
prevent the issuance of any stop order or other suspension of effectiveness of a
Registration  Statement,  or the suspension of the  qualification  of any of the
Registrable  Securities for sale in any  jurisdiction,  and, if such an order or

                                       5



suspension  is issued,  to obtain the  withdrawal of such order or suspension at
the earliest  practicable time, and the Company shall  immediately  notify Legal
Counsel and all  Selling  Securityholders  and, in the event of an  underwritten
offering,  the  managing  underwriter(s),  of the  issuance  of  such  order  or
suspension and the resolution thereof.

     3.7.  Inspection  of  Records.  The  Company  shall  provide  each  Selling
Securityholder,  Legal Counsel and any  underwriter  who may  participate in the
distribution of Registrable  Securities,  and their respective  representatives,
the opportunity to conduct a reasonable  inquiry of the Company's  financial and
other records  during  normal  business  hours and make  available its officers,
directors and employees for questions  regarding  information  which the Selling
Securityholders,  Legal Counsel and any such underwriter may reasonably  request
in connection with the Registration  Statement;  provided,  however, the Selling
Securityholders  and any such underwriter shall hold in confidence and shall not
make any  disclosure  of any  record  or other  information  which  the  Company
determines  in good faith to be  confidential,  and of which  determination  the
inspectors are so notified in writing, unless (a) the disclosure of such records
is necessary to avoid or correct a misstatement or omission in any  Registration
Statement,  (b) the release of such records is ordered pursuant to a subpoena or
other order from a court or  government  body of competent  jurisdiction,  or is
otherwise required by applicable law or legal process, or (c) the information in
such  records  has been made  generally  available  to the public  other than by
disclosure in violation of this or any other  agreement (to the knowledge of the
relevant inspector).

     3.8.  Compliance  with Laws.  The Company shall comply with all  applicable
laws related to a  Registration  Statement  and offering and sale of  securities
covered by the  Registration  Statement and all applicable rules and regulations
of  governmental   authorities  in  connection  therewith  (including,   without
limitation, the Securities Act and the Exchange Act).

     3.9.  Listing.  The  Company  shall cause all such  Registrable  Securities
registered  pursuant to this Agreement to be listed on each securities  exchange
on which similar securities issued by the Company are then listed.

     3.10.  Transfer Agent and  Registrar.  The Company shall provide a transfer
agent and registrar for all Registrable  Securities  registered pursuant to this
Agreement and a CUSIP number for all such Registrable  Securities,  in each case
not later than the effective date of such registration.

     3.11 Underwriting.  The Company shall enter into such customary  agreements
(including  underwriting  agreements in customary  form) and take all such other
actions reasonably  necessary in order to expedite or facilitate the disposition
of such Registrable Securities.

                   ARTICLE 4 - OBLIGATIONS OF THE INVESTORS

     4.1. Obligations of the Investors. Each Investor electing to participate in
any registration of Registrable Securities as a Selling Securityholder generally
agrees as follows:

                                       6



          (a)  Information  Concerning  Investors;   Cooperation.  Each  Selling
     Securityholder  agrees to cooperate with the Company in connection with the
     preparation and filing of any Registration Statement hereunder,  and for so
     long as the Company is  obligated to keep any such  Registration  Statement
     effective,  such Selling  Securityholder  will  provide to the Company,  in
     writing, for use in the Registration  Statement,  all information regarding
     such Selling Securityholder, the Registrable Securities held by him, her or
     it, the intended method of distribution of such Registrable  Securities and
     such other information as may be reasonably necessary to enable the Company
     to  prepare  the  Registration   Statement  and  prospectus   covering  the
     Registrable  Securities  and to maintain  the  currency  and  effectiveness
     thereof.  At least 30 days prior to the first anticipated  filing date of a
     Registration   Statement,   the   Company   shall   notify   each   Selling
     Securityholder  of the  information  the Company so requires from each such
     Selling Securityholder and each Selling Securityholder shall deliver to the
     Company such requested  information  within 20 days of request  therefor or
     shall be excluded from such registration.

          (b) SEC. Each Selling  Securityholder agrees to use reasonable efforts
     to cooperate  with the Company (at the Company's  expense) in responding to
     comments of the staff of the SEC relating to such Selling Securityholder.

                     ARTICLE 5 - EXPENSES OF REGISTRATION

     5.1. Expenses.  With respect to each registration of Registrable Securities
hereunder,   all  expenses   incurred  in  connection  with  any   registration,
qualification or compliance  pursuant to the terms of this Agreement (other than
underwriting discounts and commissions and transfer taxes),  including,  without
limitation,  the  reasonable  fees  and  disbursements  of  Legal  Counsel,  all
registration,  listing and  qualification  fees,  printers and  accounting  fees
(including any special  audits),  and the fees and  disbursements of counsel for
the Company, shall be borne by the Company.

                         ARTICLE 6 - INDEMNIFICATION

     In the event any  Registrable  Securities  are  included in a  Registration
Statement under this Agreement:

     6.1.  Indemnification  by the  Company.  The Company will  indemnify,  hold
harmless and defend (a) each Selling  Securityholder,  (b) each  underwriter  of
Registrable  Securities,  and (c) the directors,  officers,  partners,  members,
employees,  agents and persons who control each such Selling  Securityholder and
any such  underwriter  within the meaning of Section 15 of the Securities Act or
Section 20 of the Exchange Act, if any (each, a "Investor  Indemnified Person"),
against any losses, claims, damages,  liabilities (joint or several) or expenses
(collectively, together with actions, proceedings or inquiries whether or not in
any  court,   before  any   administrative   body  or  by  any   regulatory   or
self-regulatory  organization,  whether  commenced  or  threatened,  in  respect
thereof,  "Claims")  to which any of them may  become  subject  insofar  as such
Claims arise out of or are based upon:

                                       7



          (i) any untrue  statement  or alleged  untrue  statement of a material
     fact in a  Registration  Statement or the  omission or alleged  omission to
     state  therein a material  fact  required to be stated or necessary to make
     the statements therein not misleading;

          (ii) any untrue  statement or alleged  untrue  statement of a material
     fact contained in any preliminary prospectus if used prior to the effective
     date of such Registration  Statement,  or contained in the final prospectus
     (as amended or supplemented,  if the Company files any amendment thereof or
     supplement  thereto  with the SEC) or the  omission or alleged  omission to
     state  therein any  material  fact  necessary to make the  statements  made
     therein,  in light of the circumstances  under which the statements therein
     were made, not misleading; or

          (iii)  any  violation  or  alleged  violation  by the  Company  of the
     Securities  Act,  the  Exchange  Act,  any other  law,  including,  without
     limitation,  any state securities law, or any rule or regulation thereunder
     relating to the offer or sale of the Registrable Securities (the matters in
     the foregoing clauses (i) through (iii) being, collectively, "Violations").

     The Company shall reimburse each such Investor Indemnified Person, promptly
as such expenses are incurred and are due and payable,  for any reasonable legal
fees  and  other  reasonable  expenses  incurred  by  them  in  connection  with
investigating or defending any such Claim or Violation. Notwithstanding anything
to the contrary contained herein, the Company shall not be required to indemnify
or hold harmless an Investor Indemnified Person:

          (i) with  respect  to a Claim  arising  out of or  based  upon (a) any
     violation  of  federal  or state  securities  laws,  rules  or  regulations
     committed by such Investor  Indemnified Persons (or any person who controls
     any of them or any agent, broker-dealer or underwriter engaged by them), in
     the case of a  non-underwritten  offering,  based upon any  failure by such
     Investor Indemnified Person to give any purchaser of Registrable Securities
     at or prior to the written  confirmation  of such sale,  a copy of the most
     recent  prospectus,  (b) an untrue  statement or omission  contained in any
     Registration  Statement or prospectus  which statement or omission was made
     in reliance upon and in conformity with written information  provided by or
     on behalf  of such  Investor  Indemnified  Person  specifically  for use or
     inclusion  in  the  Registration  Statement  or  any  prospectus,  (c)  any
     prospectus  used  after  such time as the  Company  advised  such  Investor
     Indemnified Person in writing that the filing of a post-effective amendment
     or supplement thereto was required,  except the prospectus as so amended or
     supplemented,  or (d) any prospectus  used after such time as the Company's
     obligation  to keep the  Registration  Statement  effective and current has
     expired or been  suspended  hereunder,  provided,  that the  Company has so
     advised such Investor Indemnified Person in writing;

          (ii) shall not apply to  amounts  paid in  settlement  of any Claim if
     such  settlement  is  effected  without  the prior  written  consent of the
     Company, which consent shall not be unreasonably withheld; and

                                       8



          (iii)  with  respect  to any  preliminary  prospectus,  if the  untrue
     statement  or  omission  of  material  fact  contained  in the  preliminary
     prospectus  was  corrected  on a timely  basis in the  prospectus,  as then
     amended or  supplemented,  if such  corrected  prospectus  was timely  made
     available by the Company to such Investor  Indemnified  Person  pursuant to
     Section 3.5  hereof,  and such  Investor  Indemnified  Person was  promptly
     advised in writing  not to use the  incorrect  prospectus  prior to the use
     giving   rise  to  a  Claim   and   such   Investor   Indemnified   Person,
     notwithstanding such written advice, used it.

     Such  indemnity  shall  remain in full force and effect  regardless  of any
investigation made by or on behalf of the Investor  Indemnified Person and shall
survive the  transfer of the  Registrable  Securities  by an Investor or Selling
Securityholder pursuant to Article 9.

     6.2.  Indemnification  by Investors.  To the extent  permitted by law, each
Selling  Securityholder,  severally  and  not  jointly,  shall  indemnify,  hold
harmless and defend,  the Company,  each of its directors,  each of its officers
who signs the Registration Statement, its employees, agents and persons, if any,
who control the Company  within the meaning of Section 15 of the  Securities Act
or Section 20 of the Exchange Act, and any other Selling  Securityholder selling
securities  pursuant  to the  Registration  Statement  and  any  underwriter  of
securities covered by such Registration Statement,  together with its directors,
officers and members, and any person who controls such Selling Securityholder or
underwriter  within the meaning of the Securities Act or the Exchange Act (each,
a  "Company  Indemnified  Person"),  against  any Claim to which any of them may
become subject, under the Securities Act, the Exchange Act or otherwise, insofar
as such Claim arises out of or is based upon any Violation,  in each case to the
extent (and only to the extent) that such Violation  occurs in reliance upon and
in conformity with written information  furnished to the Company by such Selling
Securityholder expressly for use in connection with such Registration Statement.
Such Selling Securityholder will reimburse any legal or other expenses (promptly
as such  expenses are incurred and are due and payable)  reasonably  incurred by
any person intended to be indemnified pursuant to this Section 6.2 in connection
with investigating or defending any such Claim.

     Notwithstanding   anything  else  contained  herein  to  the  contrary  the
indemnity  agreement  contained  in this  Section 6.2 shall not apply to amounts
paid in settlement of any Claim if such settlement is effected without the prior
written  consent of such  Selling  Securityholder,  which  consent  shall not be
unreasonably  withheld;  and  provided,  further,  however,  that  such  Selling
Securityholder  shall be liable under this Agreement (including this Section 6.2
and Article 7) for only that amount as does not exceed the net proceeds actually
received by such Selling  Securityholder  as a result of the sale of Registrable
Securities pursuant to such Registration Statement.

     Such  indemnity  shall  remain in full force and effect  regardless  of any
investigation made by or on behalf of such Company  Indemnified Person and shall
survive the transfer of the  Registrable  Securities by such Investor or Selling
Securityholder.

     Notwithstanding   anything   to  the   contrary   contained   herein,   the
indemnification  agreement  contained  in this  Section 6.2 with  respect to any

                                       9



preliminary prospectus shall not inure to the benefit of any Company Indemnified
Person if the untrue  statement  or omission of material  fact  contained in the
preliminary  prospectus  was corrected on a timely basis in the  prospectus,  as
then  amended or  supplemented,  and the Company  Indemnified  Person  failed to
utilize such corrected prospectus.

     6.3.  Notices.  Promptly after receipt by a Company  Indemnified  Person or
Investor  Indemnified  Person under this Article 6 of notice of the commencement
of any action  (including any  governmental  action),  such Company  Indemnified
Person or Investor Indemnified Person shall, if a Claim in respect thereof is to
be made  against any  indemnifying  party under this  Article 6,  deliver to the
indemnifying party a written notice of the commencement  thereof.  In such event
the indemnifying  party shall have the right (at its expense) to participate in,
and, to the extent the  indemnifying  party so desires,  jointly  with any other
indemnifying  party  similarly  noticed,  to assume and continue  control of the
defense thereof with counsel  mutually  satisfactory  to the parties;  provided,
however,  that an indemnified party (together with all indemnified parties which
may be  represented  without  conflict by one  counsel)  shall have the right to
retain one separate counsel, with the reasonable fees and expenses to be paid by
the indemnifying  party, if there may be one or more legal defenses available to
such indemnified party or parties that are different from or additional to those
available to the  indemnifying  party.  . Counsel  handling such matter shall be
mutually satisfactory to the indemnifying party and the Indemnified Person.

     The failure to deliver  written notice to the  indemnifying  party within a
reasonable  time of the  commencement  of any such action shall not relieve such
indemnifying party of any liability to the Indemnified Person under this Article
6,  except to the extent  that the  indemnifying  party is  actually  materially
prejudiced in its ability to defend such action. The indemnification required by
this Article 6 shall be made by periodic  payments of the amount  thereof during
the course of the  investigation or defense,  as such expense,  loss,  damage or
liability is incurred and is due and payable.

                           ARTICLE 7 - CONTRIBUTION

     7.1 To provide for just and equitable  contribution,  if (i) an indemnified
party makes a claim for indemnification  pursuant to Section 6.1 or 6.2 (subject
to the limitations  thereof) but it is found in a final judicial  determination,
not subject to further appeal, that such  indemnification may not be enforced in
such case, even though this Agreement  expressly provides for indemnification in
such case, then the indemnifying party, in lieu of indemnifying such indemnified
party  hereunder,  shall  contribute  to the  amount  paid  or  payable  by such
indemnified party as a result of the losses,  liabilities,  claims, damages, and
expenses whatsoever to which any of them may be subject in such proportion as is
appropriate  on the basis of relevant  equitable  considerations  to reflect the
relative fault of the indemnifying  party on the one hand and of the indemnified
party on the other hand in  connection  with the facts  which  resulted  in such
losses,  liabilities,  claims, damages, and expenses;  provided that in no event
shall any  contribution  by any Selling  Securityholder  under this  Section 7.1
exceed  the  net   proceeds   from  the   offering   received  by  such  Selling
Securityholder.

     7.2 The relative  fault of the  indemnifying  party and of the  indemnified
party, in the case of an untrue statement, alleged untrue statement, omission or

                                       10



alleged  omission  shall be  determined  by,  among other  things,  whether such
statement,   alleged  statement,   omission,  or  alleged  omission  relates  to
information supplied by the indemnifying party or the indemnified party, and the
parties' relative intent, knowledge,  access to information,  and opportunity to
correct or prevent  such  statement,  alleged  statement,  omission,  or alleged
omission.  The  Company and each of the  Selling  Securityholders  agree that it
would be unjust and inequitable if the respective obligations of the Company and
the Selling  Securityholders for contribution were determined by pro rata or per
capita allocation of the aggregate losses,  liabilities,  claims,  damages,  and
expenses (even if the Selling  Securityholders and the other indemnified parties
were  treated  as one  entity  for  such  purpose)  or by any  other  method  of
allocation  that does not reflect the  equitable  considerations  referred to in
this Article Section 7. The amount paid or payable by an indemnified  party as a
result  of the  losses,  claims,  damages,  liabilities  or  expenses,  joint or
several, in respect thereof,  referred to in this paragraph,  shall be deemed to
include any legal or other  expenses  reasonably  incurred  by such  indemnified
party in connection with investigating or defending any such action or claim.

     7.3 In no case  shall  any  Selling  Securityholder  be  responsible  for a
portion of the contribution obligation imposed on the Selling Securityholders in
excess of the net proceeds actually received by such Selling Securityholder as a
result  of the sale of  Registrable  Securities  pursuant  to such  Registration
Statement.  No  person  guilty of a  fraudulent  misrepresentation  (within  the
meaning  of  Section  11(f)  of  the  Securities   Act)  shall  be  entitled  to
contribution   from  any   person   who  is  not   guilty  of  such   fraudulent
misrepresentation.

     7.4 For purposes of this  Article 7, each person,  if any, who controls any
Selling Securityholder within the meaning of Section 15 of the Securities Act or
Section 20 of the Exchange Act and each officer,  director,  partner,  employee,
agent, and counsel of each such Selling  Securityholder  or control person shall
have the same rights to contribution as such Selling  Securityholder  or control
person and each person,  if any, who controls the Company  within the meaning of
Section 15 of the  Securities  Act or Section  20(a) of the Exchange  Act,  each
officer of the Company who signs the  Registration  Statement,  each director of
the Company,  and its or their respective  counsel shall have the same rights to
contribution  as the  Company,  subject in each case to the  provisions  of this
Article 7. Anything in this Article 7 to the contrary notwithstanding,  no party
shall be liable for contribution  with respect to the settlement of any claim or
action  effected  without its  written  consent.  This  Article 7 is intended to
supersede any right to  contribution  under the Securities Act, the Exchange Act
or otherwise.

                  ARTICLE 8 - REPORTS UNDER THE EXCHANGE ACT

     8.1. Rule 144  Reporting.  With a view to making  available the benefits of
certain rules and  regulations  of the SEC which may at any time permit the sale
of the Registrable  Securities to the public without registration or pursuant to
a registration on Form S-3, the Company agrees to:

          (a) Make and keep  public  information  available,  as those terms are
     understood and defined in Rule 144 under the  Securities  Act, at all times
     after  the  date  that  the  Company   becomes  subject  to  the  reporting
     requirements of the Securities Act or the Exchange Act;

                                       11



          (b) File with the  Commission in a timely manner all reports and other
     documents required of the Company under the Securities Act and the Exchange
     Act  (at  any  time  after  it  has  become   subject  to  such   reporting
     requirements); and

          (c) So  long  as  any  Selling  Securityholder  owns  any  Registrable
     Securities,  to  furnish  to such  Selling  Securityholder  forthwith  upon
     written request (i) a written statement by the Company as to its compliance
     with the reporting requirements of said Rule 144 (at any time after 90 days
     after the effective date of the first  registration  statement filed by the
     Company for an offering of its  securities to the general  public),  and of
     the  Securities  Act and the  Exchange Act (at any time after it has become
     subject  to  such  reporting  requirements),  or  that  it  qualifies  as a
     registrant whose securities may be resold pursuant to Form S-3 (at any time
     after it so qualifies),  (ii) a copy of the most recent annual or quarterly
     report of the Company,  and (iii) such other  reports and  documents of the
     Company and other information in the possession of or reasonably obtainable
     by the Company as any such Selling Securityholder may reasonably request in
     availing  itself of any rule or regulation of the SEC allowing such Selling
     Securityholder to sell any such securities without registration.

         ARTICLE 9 - AMENDMENT AND ASSIGNMENT OF REGISTRATION RIGHTS

     9.1.  Assignment  of  Registration  Rights.  The  rights  of  any  Investor
hereunder as to Registrable Securities  transferred by such Investor,  including
the right to have the Company register  Registrable  Securities pursuant to this
Agreement,  shall be automatically assigned by the Investor to any transferee of
all or any portion of the Registrable  Securities,  whether such transfer occurs
before  or after the  Registration  Statement  becomes  effective,  if:  (a) the
Company is, within 10 Business Days after such transfer or assignment, furnished
with written notice of (i) the name and address of such  transferee or assignee,
and (ii) the securities with respect to which such registration rights are being
transferred or assigned, (b) following such transfer or assignment,  the further
disposition of such securities by the transferee or assignee is restricted under
the Securities Act or applicable state securities laws, and (c) at or before the
time the Company receives the written notice  contemplated by clause (a) of this
sentence,  the  transferee or assignee  agrees in writing for the benefit of the
Company to be bound by all of the provisions contained herein. The rights of any
Investor hereunder with respect to any Registrable  Securities  retained by such
Investor  shall not be assigned by virtue of the  transfer of other  Registrable
Securities.

     9.2. Amendment of Registration Rights. Except as expressly provided in this
Agreement,  neither this  Agreement nor any term hereof may be amended,  waived,
discharged or terminated other than by a written  instrument signed by the party
against whom enforcement of any such amendment, waiver, discharge or termination
is sought;  provided,  however, that holders of more than 50% of the Registrable
Securities,  including St. Cloud,  may, with the written consent of the Company,
waive,  modify  or  amend  on  behalf  of all  holders,  any  provisions  hereof
benefiting  such  holders,  so long as the effect  thereof will be that all such
holders will be treated equally.

                                       12



                          ARTICLE 10 - MISCELLANEOUS

     10.1. Registered Holders. A person or entity is deemed to be a holder (or a
holder-in-interest)  of  Registrable  Securities  whenever such person or entity
owns of record such Registrable Securities.  If the Company receives conflicting
instructions,  notices or elections  from two or more  persons or entities  with
respect to the same Registrable Securities, the Company shall act upon the basis
of instructions,  notice or election  received from the registered owner of such
Registrable Securities.

     10.2.  Notices,  etc.  All  notices  and other  communications  required or
permitted  under this Agreement  shall be sent by registered or certified  mail,
postage  prepaid,  overnight  courier,  confirmed  facsimile or other electronic
transmission or otherwise delivered by hand or by messenger, addressed (a) if to
an Investor,  at such Investor's  address set forth on the signature page hereto
or at such other address as such Investor shall have furnished to the Company in
writing, (b) if to the Company at its offices at 7514 Girard Avenue, Suite 1509,
La Jolla,  California  92037, to the attention of the President or at such other
address as the Company shall have furnished to the Investors in writing,  or (c)
if any  transferee  or assignee of an Investor  pursuant to Section 9.1, at such
address as such  transferee or assignee  shall have  furnished to the Company in
writing.  Each such notice or other communication shall for all purposes of this
Agreement  be  treated  as  effective  or having  been  received  or  given,  as
applicable, (i) when delivered if delivered personally, (ii) if sent by mail, at
the  earlier of its receipt or three  Business  Days after the  registration  or
certification  thereof,  (iii) if sent by  overnight  courier,  one Business Day
after the same has been deposited with a nationally  recognized courier service,
or (iv) when sent by confirmed  facsimile or other electronic  transmission,  on
the day sent (if a Business  Day) if sent during  normal  business  hours of the
recipient,  and if not,  then on the next  Business  Day  (provided,  that  such
facsimile or other  electronic  transmission is followed by delivery via another
method permitted by this Section 10.2).

     10.3. Delays or Omissions.  Except as expressly provided in this Agreement,
no delay or  omission  to exercise  any right,  power or remedy  accruing to any
Investor  upon any breach or default of the Company under this  Agreement  shall
impair  any such  right,  power  or  remedy  of such  Investor  nor  shall it be
construed  to be a waiver of any such  breach  or  default,  or an  acquiescence
therein,  or of or in any similar breach or default  thereafter  occurring;  nor
shall any waiver of any single breach or default be deemed a waiver of any other
breach or default  theretofore  or  thereafter  occurring.  Any waiver,  permit,
consent or approval of any kind or  character on the part of any Investor of any
breach  or  default  under  this  Agreement,  or any  waiver  on the part of any
Investor of any provisions or conditions of this  Agreement,  must be in writing
and  shall  be  effective  only to the  extent  specifically  set  forth in such
writing.  All  remedies,  either  under this  Agreement  or by law or  otherwise
afforded to any Investor shall be cumulative and not alternative.

     10.4.  Remedies.  Any Person  having  rights  under any  provision  of this
Agreement  will be  entitled  to enforce  such  rights  specifically  to recover
damages caused by reason of any breach of any provision of this Agreement and to
exercise  all  other  rights  granted  by law.  The  parties  hereto  agree  and
acknowledge  that money damages may not be an adequate  remedy for any breach of
the provisions of this  Agreement and that any party may in its sole  discretion

                                       13



apply to any court of law or equity of competent  jurisdiction  (without posting
any bond or other  security) for specific  performance  or for other  injunctive
relief in order to  enforce  or  prevent  violation  of the  provisions  of this
Agreement.

     10.5. Governing Law; Jurisdiction.  This Agreement shall be governed in all
respects by the laws of the State of  California  without  giving  effect to the
conflicts of laws and  principles  thereof.  All suits,  actions or  proceedings
arising  out of, or in  connection  with,  this  Agreement  or the  transactions
contemplated by this Agreement shall be brought in any federal or state court of
competent subject matter jurisdiction sitting in California. Each of the parties
hereto by execution and delivery of this  Agreement,  expressly and  irrevocably
(i) consents and submits to the personal  jurisdiction of any such courts in any
such  action or  proceeding;  (ii)  consents  to the  service of any  complaint,
summons,  notice or other  process  relating to any such action or proceeding by
delivery  thereof to such party as set forth in Section 10.2  hereof;  and (iii)
waives  any  claim or  defense  in any such  action or  proceeding  based on any
alleged lack of personal  jurisdiction,  improper venue, forum non conveniens or
any similar basis.

     10.6. Entire Agreement;  Amendment.  This Agreement and the other documents
delivered  pursuant to this  Agreement  at the Closing  constitute  the full and
entire  understanding  and  agreement  between  the  parties  with regard to the
subject  matter hereof and thereof and supersede all prior  agreements and merge
all prior  discussions,  negotiations,  proposals  and offers  (written or oral)
between  them,  and no party  shall be liable or bound to any other party in any
manner by any  representations,  warranties,  covenants or agreements  except as
specifically set forth herein or therein.  Except as expressly  provided in this
Agreement,  neither this  Agreement nor any term hereof may be amended,  waived,
discharged or terminated other than by a written  instrument signed by the party
against whom enforcement of any such amendment, waiver, discharge or termination
is sought.

     10.7.  Successors and Assigns.  Subject to Article 9 hereof, the provisions
of this  Agreement  shall  inure to the  benefit  of, and be binding  upon,  the
permitted  successors,  assigns,  heirs,  executors  and  administrators  of the
parties to this Agreement, except that the Company may not assign this Agreement
without  the  written  consent  of the  Holders  of at  least  50%  of the  then
outstanding Registrable Securities.

     10.8.  Titles and  Subtitles.  The headings in this  Agreement are used for
convenience  of reference  only and shall not be  considered  in  construing  or
interpreting this Agreement.

     10.9.  Counterparts.  This  Agreement  may be  executed  in any  number  of
counterparts,  each of which shall be enforceable  against the parties  actually
executing such  counterparts,  and all of which  together  shall  constitute one
instrument.  This  Agreement  may  be  delivered  by  facsimile,  and  facsimile
signatures shall be treated as original signatures for all applicable purposes.

     10.10. Further Assurances.  Each party shall do and perform, or cause to be
done and  performed,  all such  further acts and things,  and shall  execute and
deliver all such other agreements,  certificates,  instruments and documents, as
the other  party may  reasonably  request  in order to carry out the  intent and

                                       14



accomplish  the  purposes  of  this  Agreement  and  the   consummation  of  the
transactions contemplated hereby.

     10.11.  Consents.  Unless otherwise provided herein, all consents and other
determinations  to be made pursuant to this Agreement shall be made on the basis
of a majority in interest  (determined by number of securities)  with respect to
the Registrable Securities.

     10.12.  Severability.  In the event that any  provision  of this  Agreement
becomes or is  declared  by a court of  competent  jurisdiction  to be  illegal,
unenforceable  or void,  this Agreement  shall continue in full force and effect
without said provision.

     10.13.  No Third Party  Beneficiaries.  This Agreement shall not confer any
rights or remedies upon any person other than the parties hereto, each investor,
their permitted  successors and assigns and parties eligible for indemnification
under  Article  6,  and  only in  accordance  with  the  express  terms  of this
Agreement.

     10.14.   Construction.   The  parties  have  participated  jointly  in  the
negotiation  and  drafting  of this  Agreement.  In the  event an  ambiguity  or
question of intent or interpretation  arises,  this Agreement shall be construed
as if drafted jointly by the parties and no presumption or burden of proof shall
arise  favoring or  disfavoring  any party by virtue of the authorship of any of
the provisions of this Agreement.  Any reference to any federal, state, local or
foreign  statute  or law  shall  be  deemed  also  to  refer  to all  rules  and
regulations  promulgated  thereunder and any applicable  common law,  unless the
context requires  otherwise.  The word "including"  shall mean including without
limitation and is used in an  illustrative  sense rather than a limiting  sense.
Terms  used with  initial  capital  letters  will have the  meanings  specified,
applicable  to singular and plural  forms,  for all purposes of this  Agreement.
Reference  to any gender  will be deemed to include  all genders and the neutral
form.








                           [SIGNATURE PAGES FOLLOW]


                                       15



     IN WITNESS  WHEREOF,  the  parties  have caused  this  Registration  Rights
Agreement to be duly executed as of the date first above written.

                                    VIKING SYSTEMS, INC.

                                         By:/s/ Thomas B. Marsh
                                            Name:  Thomas B. Marsh
                                            Title:  President/CEO


                                    INVESTORS:

                                    ST. CLOUD CAPITAL PARTNERS, L.P.

                                    By:  SCGP, LLC
                                    Its:  General Partner

                                    By:  /s/ Cary S. Fitchey
                                               Cary S. Fitchey
                                               Senior Managing Member

                                    Address:
                                    10866 Wilshire Boulevard, Suite 1450
                                    Los Angeles, CA  90024

                                       16



                                 SIGNATURE PAGE TO


                        REGISTRATION RIGHTS AGREEMENT

                          DATED AS OF MARCH 22, 2005

                                 BY AND AMONG

                            VIKING SYSTEMS, INC.,

                      ST. CLOUD CAPITAL PARTNERS, L.P.,
                     AND EACH INVESTOR SIGNATORY THERETO

     The  undersigned  hereby executes and delivers the  Registration  Agreement
(the  "Registration  Agreement")  to  which  this  Signature  Page  is  attached
effective as of the date of the  Agreement,  which  Registration  Agreement  and
Signature Page,  together with all  counterparts of such Agreement and signature
pages  of the  other  Investors  party  to such  Registration  Agreement,  shall
constitute  one and the same  document  in  accordance  with  the  terms of such
Registration Agreement.


                                    INVESTORS:


                                    By:  /s/ Donald Tucker


                                    Name:           Donald Tucker
                                                      (Print)

                                    Title:              ----
                                                   (If applicable)

                                    Address  1626 Clemson Circle
                                             La Jolla, California 92037
                                    Facsimile








                                SIGNATURE PAGE TO


                          REGISTRATION RIGHTS AGREEMENT

                           DATED AS OF MARCH 22, 2005

                                  BY AND AMONG

                              VIKING SYSTEMS, INC.,

                        ST. CLOUD CAPITAL PARTNERS, L.P.,
                       AND EACH INVESTOR SIGNATORY THERETO

     The  undersigned  hereby executes and delivers the  Registration  Agreement
(the  "Registration  Agreement")  to  which  this  Signature  Page  is  attached
effective as of the date of the  Agreement,  which  Registration  Agreement  and
Signature Page,  together with all  counterparts of such Agreement and signature
pages  of the  other  Investors  party  to such  Registration  Agreement,  shall
constitute  one and the same  document  in  accordance  with  the  terms of such
Registration Agreement.

                                    INVESTORS:


                                    By:  /s/ Brian Miller


                                    Name:         Brian Miller
                                                     (Print)

                                    Title:              ----
                                                   (If applicable)

                                    Address  c/o EVP Strategic Alliances
                                             One Market Plaza Spear Tower
                                             Suite 700
                                             San Francisco, California  94105
                                    Facsimile





                                                                       EXHIBIT A

                                  JOINDER TO
                        REGISTRATION RIGHTS AGREEMENT



     THIS JOINDER to the Registration  Rights  Agreement,  dated as of March 22,
2005 by and among Viking Systems,  Inc., a Nevada  corporation  (the "Company"),
and certain  Investors party thereto,  as such agreement may have been or may be
amended  from time to time (the  "Agreement"),  is made and  entered  into as of
_______ ___,  2005 by and between the Company and the  individuals  and entities
listed on the signature page hereto (each,  an  "Investor").  Capitalized  terms
used herein but not  otherwise  defined shall have the meanings set forth in the
Agreement.

     WHEREAS,  pursuant to that certain Securities Purchase Agreement,  dated as
of the Agreement, and each amendment, supplement and addendum thereto, among the
Company,  the Lead Lender and Collateral Agent (each as defined therein) and the
Investors (the "Securities Purchase Agreement"),  each of the Investors acquired
a  Promissory  Note and a Warrant to  purchase  shares of the  Company's  Common
Stock, subject to the terms and conditions of the Securities Purchase Agreement.

     WHEREAS,  the  Securities  Purchase  Agreement  requires  the  Company  and
Investor to become a party to the Agreement,  and the Company and Investor agree
to do so in accordance with the terms hereof.

     NOW,  THEREFORE,  in consideration of the mutual covenants contained herein
and other good and valuable consideration,  the receipt and sufficiency of which
are hereby acknowledged, the parties to this Joinder hereby agree as follows:

     1.  Agreement to be Bound.  Investor  hereby agrees that upon  execution of
this  Joinder,  he, she or it shall become a party to the Agreement and shall be
fully bound by, and subject to, all of the  covenants,  terms and  conditions of
the  Agreement  as  though  an  original  party  thereto  and  shall be deemed a
"Investor" for all purposes thereof.

     2. Counterparts. This Joinder may be executed in separate counterparts each
of which shall be an original and all of which taken together  shall  constitute
one and the same agreement.

     3.  Notices.  For purposes of Section 10.2 of the  Agreement,  all notices,
demands or other  communications  to each of the  Investors  hereunder  shall be
directed to the  applicable  Investor's  address as listed on the signature page
hereto.





     5.  Governing  Law.  This Joinder  shall be governed in all respects by the
laws of the State of California  without  giving effect to the conflicts of laws
and principles thereof.  All suits, actions or proceedings arising out of, or in
connection with, this Joinder or the  transactions  contemplated by this Joinder
shall be  brought in any  federal or state  court of  competent  subject  matter
jurisdiction sitting in California.  Each of the parties hereto by execution and
delivery of this Joinder,  expressly and irrevocably (i) consents and submits to
the personal  jurisdiction  of any such courts in any such action or proceeding;
(ii) consents to the service of any complaint,  summons, notice or other process
relating to any such action or proceeding  by delivery  thereof to such party as
set  forth in  Section  10.2 of the  Agreement;  and (iii)  waives  any claim or
defense in any such action or  proceeding  based on any alleged lack of personal
jurisdiction, improper venue, forum non conveniens or any similar basis.

     6.  Descriptive  Headings.  The  descriptive  headings of this  Joinder are
inserted for convenience only and do not constitute a part of this Joinder.





                           [Signature Page Follows]


                                       2




     The parties  hereto have executed this Joinder to the  Registration  Rights
Agreement as of the date first set forth above.



                                    VIKING SYSTEMS, INC.

                                         By:___________________________________
                                            Name:
                                            Title:

                                    Address:

                                      S-1





      The parties hereto have executed this Joinder to the Registration
Rights Agreement as of the date first set forth above.


                                    INVESTORS:


                                    By:________________________________________


                                    Name:______________________________________
                                          (Print)

                                    Title:_____________________________________
                                          (If applicable)

                                    Address ___________________________________
                                    ___________________________________________
                                    Facsimile _________________________________