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[OM] 35-70mm f/4 Auto Focus [was: Please advise on MC]

Subject: [OM] 35-70mm f/4 Auto Focus [was: Please advise on MC]
From: PCACala@xxxxxxx
Date: Sat, 17 Oct 1998 07:44:48 EDT
Hi Frank:

Regarding the 35-70mm f/4.0 Auto Focus Zuiko versus the S Zuiko:

> I would have
>  expected one of the positive (convex) elements in the lens to be
>  _thinner_ to correct for the longer lightpath to the film.... or is it
>  a concave one being thicker?

It is the 4th element and it is convex and thicker.  BUT, element 1 and 3 are
slightly thinner.  (I'd be on thin ice trying to describe the difference in
words).  Let's just say the AF lens is an apparent slight modification of the
formula used for the S Zuiko.  It is also 77 (vs. 71mm) long.  I have no way
of knowing if the glass elements are the same, though.

I'll try and find the time to performance test this lens vs. the S Zuiko
before I ship it to its new owner - whoever that might be.

Gary Reese
Las Vegas, NV

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