EXHIBIT 5.1
 
                     [LETTERHEAD OF HEWITT & MCGUIRE, LLP]

                                August 20, 1997

CalComp Technology, Inc.
2411 W. La Palma Avenue
Anaheim, CA 92803

      Re:  Form S-8 Registration Statement
           -------------------------------

Gentlemen:

      We have acted as your legal counsel in the preparation of the Form S-8
Registration Statement ("Registration Statement") which will be filed with the
Securities and Exchange Commission in connection with the registration under the
Securities Act of 1933, as amended, of 513,800 shares of common stock, $.01 par
value, ("Common Stock") of CalComp Technology, Inc., a Delaware corporation,
("Company") issuable upon exercise of the stock options granted pursuant to
Summagraphics Corporation 1987 Stock Plan.

      As such legal counsel, we have made such legal and factual inquiries as we
deemed necessary under the circumstances for the purpose of rendering this
opinion. In reliance thereon, we are of the opinion that the 513,800 shares of
Common Stock of the Company being registered under the aforementioned
Registration Statement will, when issued in full pursuant to the options granted
and exercised in accordance with the terms of the stock option plan and related
stock option agreements, be duly authorized and validly issued, fully paid and
non-assessable.

      We hereby consent to the filing of this opinion as an exhibit to the 
aforementioned Registration Statement.

                                                 Sincerely,

                                                 /s/ HEWITT & MCGUIRE, LLP
                                                 -------------------------
                                                 HEWITT & MCGUIRE, LLP

PAR/CSE/dcw