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                        [FENWICK & WEST LLP letterhead]


                                  May 31, 1996


Radius Inc.
215 Moffett Park Drive
Sunnyvale, CA  94089

Gentlemen/Ladies:

         At your request, we have examined the Registration Statement on Form
S-8 (the "Registration Statement") to be filed by you with the Securities and
Exchange Commission on or about May 31, 1996 in connection with the registration
under the Securities Act of 1933, as amended, of an aggregate of 850,000 shares
of your Common Stock, no par value (the "Stock"), all of which may be sold by
you pursuant to options granted or to be granted by you to your (or your
parents', affiliates' or subsidiaries') employees, officers, consultants and
independent contractors pursuant to your 1995 Stock Option Plan (the "Plan").

         As your counsel, we have examined the proceedings taken by you in
connection with the adoption of the 1995 Stock Option Plan.

         It is our opinion that the Stock that may be issued and sold by you
pursuant to the Plan, when issued and sold in the manner referred to in the
Prospectus associated with the Registration Statement and the Plan, will be
legally issued, fully paid and nonassessable.

         We consent to the use of this opinion as an exhibit to the Registration
Statement and further consent to all references to us, if any, in the
Registration Statement and any amendments thereto.

                                                   Very truly yours,



                                                   FENWICK & WEST LLP