EXHIBIT 99.2

                            CERTIFICATION PURSUANT TO
                                 18 U.S.C. 1350,
                             AS ADOPTED PURSUANT TO
                  SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

The undersigned officer of Cognex Corporation (the "Company") hereby certifies
that the Company's quarterly report on Form 10-Q for the period ended March 30,
2003 (the "Report"), as filed with the Securities and Exchange Commission on the
date hereof, fully complies with the requirements of Section 13(a) or 15(d), as
applicable, of the Securities Exchange Act of 1934, as amended, and that the
information contained in the Report fairly presents, in all material respects,
the financial condition and results of operations of the Company. This
certificate is furnished solely pursuant to 18 U.S.C. Section 1350, as adopted
pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.

        Date:  May 12, 2003
                                         /s/ Richard A. Morin
                                         ---------------------------------------
                                         Richard A. Morin
                                         (Senior Vice President Of Finance,
                                         Chief Financial Officer, and Treasurer)
                                         (duly authorized officer, principal
                                         financial and accounting officer)


A signed original of this written statement required by Section 906 has been
provided to the Company and will be retained by the Company and furnished to the
Securities and Exchange Commission or its staff upon request.