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Re: [OM] [ OM] 90/2.0 Macro + Pan F = Smile

Subject: Re: [OM] [ OM] 90/2.0 Macro + Pan F = Smile
From: "Sawyer, Edward" <Ed.Sawyer@xxxxxxx>
Date: Thu, 15 Mar 2012 16:44:40 +0000
I think the unreleased 85/1.4 had an aspherical element. It had a GRIN
element which achieves some of the same concepts. Marco Covina had abit of
info on it, and there's a patent for it too.

They also had a patent on a 24/1.4 that was never released which may have
had aspherical elements, I forget.

85/1.4: http://www.google.com/patents/US5029994

24/1.4: http://www.google.com/patents/US4770512



-Ed


> Ken, I was not under the impression that *any* of the OM lenses
> contained aspherical elements, much as this has been speculated before
> on some of the better ones. What information do you base this on?
> Olympus' line drawing of the 250/2 sure *looks* like on element is
> aspherical, but I always discounted this as an artifact of bad
> printing (or bad drawing!) in the OM System Lens Handbook.

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