EXHIBIT 5



                                SULLIVAN & WORCESTER LLP
                                ONE POST OFFICE SQUARE
                              BOSTON, MASSACHUSETTS 02109
                                    (617) 338-2800
                                 FAX NO. 617-338-2880
    IN WASHINGTON, D.C.                                    IN NEW YORK CITY
1025 CONNECTICUT AVENUE, N.W.                              767 THIRD AVENUE
   WASHINGTON, D.C. 20036                              NEW YORK, NEW YORK 10017
      (202) 775-8190                                         (212) 486-8200
   FAX NO. 202-293-2275                                    FAX NO. 212-758-2151











                                             May 12, 1997





FOCUS Enhancements, Inc.
142 North Road
Sudbury, Massachusetts 01776

Gentlemen:

         We are familiar with the Registration  Statement on Form S-8 containing
a Reoffer  Prospectus on Form S-3 (the "S-8  Registration  Statement")  to which
this opinion is an exhibit, to be filed by FOCUS Enhancements,  Inc., a Delaware
corporation (the "Company"),  with the Securities and Exchange  Commission under
the Securities Act of 1933, as amended.  The S-8 Registration  Statement relates
to the proposed public offering by certain  securityholders  of the Company of a
total of 1,920,000 shares (the "Shares") of the Company's Common Stock, $.01 par
value per share ("Common Stock"),  consisting of (i) 920,000 Shares which may be
offered from time to time by certain Key  Officers of the Company,  which Shares
are  issuable  by the Company to such  officers  upon  exercise of options  (the
"Officer   Options")  pursuant  to  Key  Officer   Non-Qualified   Stock  Option
Agreements,  and (ii)  1,000,000  Shares  issuable upon exercise of options (the
"Director Options") pursuant to the 1997 Director Stock Option Plan which may be
offered from time to time by the Directors of the Company for their own benefit.
The Officer Options and the Director Options are hereinafter  referred to as the
"Options".

         We have  acted  as  counsel  to the  Company  in  connection  with  the
preparation of the S-8 Registration  Statement,  and we have examined and relied
on  the  originals  or  copies,   certified  or  otherwise   identified  to  our
satisfaction  of all such  corporate  records  of the  Company  and  such  other
instruments   and  other   certificates  of  public   officials,   officers  and
representatives  of the  Company and such other  persons,  and we have made such
investigations of law, as we have deemed  appropriate as a basis for the opinion
expressed below. In making such examination,  we have assumed the genuineness of
all signatures,  the legal capacity of natural persons,  the authenticity of all
documents submitted to us as originals and the conformity to the originals of





FOCUS Enahncements, Inc.
May 12, 1997
Page 2


all documents  submitted to us as copies,  which facts we have not independently
verified. As to various facts material to the opinions set forth herein, we have
relied without  independent  verification  upon certificates of public officials
and upon facts certified to us by officers of the Company. We express no opinion
herein as to any laws other  than the  General  Corporation  Law of the State of
Delaware.

         Based upon the  foregoing,  we are of the opinion  that the Company has
corporate  power adequate for the issuance of the Shares  issuable in the manner
set forth in the S-8  Registration  Statement  and  offered  pursuant to the S-8
Registration  Statement.  The Shares  issuable upon the exercise of the Options,
assuming  exercise on the date hereof have been duly authorized and reserved for
issuance.  Upon the  exercise  of the  Options  and  delivery  of the  Shares in
accordance  with the terms of the Options,  the Shares so issued will be validly
issued, fully paid and non-assessable.

         We hereby  consent to the  filing of this  opinion as an exhibit to the
S-8 Registration Statement.

                                              Very truly yours,



                                              SULLIVAN & WORCESTER LLP