EXHIBIT 5.1

OPINION REGARDING LEGALITY













                                                                    June 4, 1999

To the parties listed on Annex A attached hereto

               Re:   Mortgage Lenders Network Home Equity Loan Trust 1999-1,
                     Asset Backed Notes, Series 1999-1, Class A-1 and Class A-2

Ladies and Gentlemen:

                  We have acted as special counsel to Residential Asset Funding
Corporation (the "Depositor") and Mortgage Lenders Network Home Equity Loan
Trust 1999-1, a Delaware business trust (the "Issuer") in connection with the
execution and delivery of the following documents:

            (i) the Mortgage Loan Sale Agreement dated as of June 1, 1999 (the
         "Sale Agreement") between the Depositor and Mortgage Lenders Network
         USA, Inc., as Seller (the "Seller");

           (ii) the Deposit Trust Agreement dated as of June 1, 1999 (the "Trust
         Agreement") among the Depositor, the Seller, Norwest Bank Minnesota,
         National Association, as Trust Paying Agent and Wilmington Trust
         Company, as Owner Trustee;

           (iii) the Management Agreement dated as of June 1, 1999 (the
         "Management Agreement") between the Issuer and Norwest Bank Minnesota,
         National Association, as Manager;

           (iv) the Mortgage Loan Contribution Agreement dated as of June 1,
         1999 (the "Contribution Agreement") between the Depositor and the
         Issuer;

            (v) the Indenture dated as of June 1, 1999 (the "Indenture") between
         Norwest Bank Minnesota, National Association, as Indenture Trustee (in
         such capacity, the "Indenture Trustee") and the Issuer;




            (vi) the Underwriting Agreement dated as of May 27, 1999 (the
         "Underwriting Agreement") between the Depositor and First Union Capital
         Markets Corp., as Representative of the Underwriters (the
         "Representative");

            (vii) the Standard Provisions to Underwriting Agreement dated as of
         May 27, 1999 between the Depositor and the Representative;

           (viii) the Custodial Agreement dated as of June 1, 1999 among
         Mortgage Lenders Network USA, Inc., as Servicer (in such capacity, the
         "Servicer"), Bank Boston, as Custodian and the Indenture Trustee;

           (ix) the Servicing Agreement dated as of June 1, 1999 among the
         Servicer, the Issuer and Norwest Bank Minnesota, as Trust Paying Agent;
         and

           (x) the Insurance Agreement dated as of June 1, 1999 (the "Insurance
         Agreement") among MBIA Insurance Corporation (the "Insurer"), the
         Issuer, the Seller, the Servicer, the Depositor and the Indenture
         Trustee.

                  Capitalized terms used herein, but not defined, shall have the
meanings assigned to them in the Indenture.

                  We have examined executed copies of the Sale Agreement, the
Underwriting Agreement, the Standard Provisions to Underwriting Agreement, the
Contribution Agreement, the Trust Agreement, the Servicing Agreement; the
Custodial Agreement, the Indenture. the Management Agreement and the Insurance
Agreement (collectively, the "Documents"). We have also examined a copy of each
of the executed Notes. We have also examined the Registration Statement No.
333-64775, as heretofore amended (the "Registration Statement") and the
Prospectus dated November 10, 1998 the Preliminary Prospectus Supplement
relating to the Notes and the Prospectus Supplement dated May 27, 1999 relating
to the Notes (such Prospectus, Preliminary Prospectus Supplement and Prospectus
Supplement being referred to together as the "Prospectus").

                  We have also examined originals or photostatic or certified
copies of all such corporate records of the Depositor and such certificates of
public officials, certificates of corporate officers, and other documents, and
such questions of law, as we have deemed relevant and necessary as a basis for
the opinions hereinafter expressed. As to certain issues of fact material to the
opinions expressed herein, we have, with your consent, relied to the extent we
deemed appropriate upon certificates and representations of officers of the
Depositor. In making our examinations and rendering the opinions herein
expressed, we have made the following assumptions:

         (1)      each party to each of the Documents (other than the Depositor)
                  has the corporate power to enter into and perform all of its
                  obligations thereunder;

         (2)      the due authorization, execution and delivery of the Documents
                  by all parties thereto (other than the Depositor) and the
                  validity and binding effect on all parties (other than the
                  Depositor) of each of the Documents, as applicable;




         (3)      the genuineness of all signatures;

         (4)      the authenticity of all documents submitted to us as originals
                  and the conformity to originals of all documents submitted to
                  us as copies;

         (5)      in the case of each purchaser of a Note investing assets of an
                  employee benefit plan covered by ERISA, such plan is a plan to
                  which Prohibited Transaction Exemption 90-32 is fully
                  available.

                  The opinions expressed in paragraphs 3 and 4 with respect to
the enforceability of certain agreements are subject to the following additional
qualifications:

                  The effect of bankruptcy, insolvency, reorganization,
         moratorium, receivership, or other similar laws of general
         applicability relating to or affecting creditors' rights generally or
         the rights of creditors of national banking associations in the event
         of bankruptcy, insolvency, reorganization, moratorium or receivership.

                  The application of general principles of equity, including,
         but not limited to, the right of specific performance (regardless of
         whether enforceability is considered in a proceeding in equity or at
         law).

                  In addition, we wish to advise you that the enforceability of
certain provisions set forth in the Underwriting Agreement which purport to
provide for indemnification for losses due to securities laws violations may be
limited by public policy considerations.

                  We are admitted to the Bar of the State of New York, and we
express no opinion as to the laws of any other jurisdiction except as to matters
that are governed by federal law and with respect to paragraph 1 below, the
General Corporation Law of the State of Delaware. All opinions expressed herein
are based on laws, regulations and policy guidelines currently in force and may
be affected by future regulations. Furthermore, no opinion is expressed herein
regarding the applicable state Blue Sky, legal investment or real estate
syndication laws.

                  Based upon the foregoing and subject to the last paragraph
hereof, we are of the opinion that:

            1. The Depositor is a corporation duly organized, validly existing
         and in good standing under the laws of the State of North Carolina and
         is duly qualified to do business in each State necessary to enable it
         to perform its obligations under the Documents to which it is a party.

            2. The Depositor has the corporate power and authority to convey the
         Mortgage Loans and to execute, deliver and perform, and to enter into
         and consummate transactions contemplated by the Documents to which it
         is a party and such Documents have been duly authorized, executed and
         delivered by the Depositor.






           3. Each of the Documents to which the Depositor is a party
         constitutes the valid, legal and binding agreement of the Depositor,
         and is enforceable against the Depositor in accordance with its terms.

           4. Each of the Documents to which the Issuer is a party is
         enforceable against the Issuer in accordance with its terms.

           5. The Notes, assuming the due execution by the Owner Trustee on
         behalf of the Trust and due authentication by the Indenture Trustee and
         payment therefor pursuant to the Underwriting Agreement, are validly
         issued and outstanding and are entitled to the benefits of the
         Indenture.

           6. No consent, approval, authorization or order of, registration or
         filing with, or notice to, any governmental authority or court is
         required under federal laws or the laws of the State of New York for
         the execution, delivery and performance of the Documents to which the
         Depositor is a party, or the offer, issuance, sale or delivery of the
         Notes or the consummation of any other transaction contemplated thereby
         by the Depositor, except such which have been obtained.

           7. The Registration Statement and the Prospectus (other than the
         financial and statistical data included therein, as to which we are not
         called upon to express any opinion), at the time the Registration
         Statement became effective, as of the date of execution of the
         Underwriting Agreement and as of the date hereof comply as to form in
         all material respects with the requirements of the Securities Act of
         1933, as amended, and the rules and regulations thereunder, and the
         Exchange Act and the rules and regulations thereunder, and we do not
         know of any amendment to the Registration Statement required to be
         filed, or of any contracts, indentures or other documents of a
         character required to be filed as an exhibit to the Registration
         Statement or required to be described in the Registration Statement or
         the Prospectus, which has not been filed or described as required.

           8. The Registration Statement is effective, and to the best of our
         knowledge, the Commission has not issued any stop order suspending the
         effectiveness of the Registration Statement (which for purposes of this
         opinion shall not be deemed to include any exhibits filed therewith) or
         any order directed to any prospectus relating to the Notes (including
         the Prospectus), and has not initiated or threatened any proceeding for
         that purpose.

           9. The Indenture has been duly qualified under the Trust Indenture
         Act of 1939 (the "TIA"), as amended, the Trust Agreement is not
         required to be qualified under the TIA and neither the Depositor nor
         the Issuer is required to be qualified under the Investment Company Act
         of 1940.

           10. The statements in the Prospectus Supplement set forth under the
         caption "DESCRIPTION OF THE NOTES," to the extent such statements
         purport



         to summarize certain provisions of the Notes or of the Indenture, are
         fair and accurate in all material respects.

           11. None of the sale of the Mortgage Loans to the Issuer, the
         issuance or sale of the Notes, or the execution, delivery or
         performance by the Depositor of its obligations under the Documents,
         conflicts with or will conflict with, or results or will result in a
         breach of, or constitutes or will constitute a default under the
         charter or bylaws of the Depositor or any law, rule or regulation of
         the United States federal government or of the State of New York.

           12. The Indenture establishes in favor of the Indenture Trustee for
         the benefit of the Noteholders and the Insurer, a valid and enforceable
         security interest in all right, title and interest of the Issuer in the
         Mortgage Loans.

                  Our opinions contained herein are rendered only as of the date
hereof, and we undertake no obligation to update this letter or the opinions
contained herein after the date hereof.

                  This opinion is furnished by us as counsel in connection with
the conveyance of the Mortgage Loans to the Issuer as of the date hereof and is
solely for the benefit of the addressees hereto, and is not to be used,
circulated, quoted or otherwise referred to for any other purpose without our
express written permission.

                                                     Very truly yours,

                                                     /s/ Dewey Ballantine LLP












                                     ANNEX A

                                                             

MBIA Insurance Corporation                                      First Union Capital Markets Corp.
113 King Street                                                 301 South College Street
Armonk, New York 10504                                          Charlotte, North Carolina 28288

                                                                Residential Asset Funding Corporation
Norwest Bank Minnesota, National Association                    c/o First Union Capital Markets
Sixth Street and Marquette Avenue                               301 South College Street
Minneapolis, Minnesota 55479-0070                               Charlotte, North Carolina  28288-0610

Standard & Poor's Ratings Services                              Moody's Investors Service, Inc.
25 Broadway                                                     99 Church Street
New York, New York 10004                                        New York, New York 10007

Mortgage Lenders Network USA, Inc.
Middlex Corporate Center, 11th Floor                            Fitch IBCA
213 Court Street                                                One State Street Plaza
Middletown, Connecticut 06457                                   New York, New York 10004

Mortgage Lenders Home Equity Loan Trust 1999-1
c/o Wilmington Trust Company                                    Wilmington Trust Company
Rodney Square North                                             Rodney Square North
1100 North Market Street                                        1100 North Market Street
Wilmington, Delaware 19890-0001                                 Wilmington, Delaware 19890-0001