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Re: [OM] Speed of lenses

Subject: Re: [OM] Speed of lenses
From: Andrew Fildes <afildes@xxxxxxxxxxxxxx>
Date: Sun, 8 Oct 2000 18:18:12 +1100
>
>I'd *love* to see the mechanical part of an adapter that allows an M645
>lens to link to the meter biasing lever.  It's external on the M645 similar
>to the old Nikkor AI lenses!   ;-)
>
>Hmmmmmm.  If my synapses fired correctly, the "thought experiment" results
>are an 80mm lens at f/2.8 with the diagonal AOV for an 80mm for 35mm
>format, approx. 30 deg.   All the extra light is in the large outer part of
>the image circle that wouldn't get used (at least 75mm dia. with a 50 deg.
>AOV)!  The adapter would have to mount the lens the same distance from the
>film gate as the M645 does for it to focus properly, and it would therefore
>have the same image circle on the OM film gate as on the M645 film gate.
>What would be really nifty is an adapter that allowed shifting it to make
>use of the large image circle!
>
>Same applies to the 80/1.9, except you'd have an 80/1.9, which BTW I've
>been *very* tempted to buy!  Supposedly it's slightly softer than the f/2.8
>although I haven't researched it that thoroughly.
>
>-- John
>

It's all out there -
http://www.zoerk.com/pages/p_mima.htm
medium format lenses on 35mm cameras - with or without shift - they assume
that an 80mm 66 or 645 lens on a 35mm camera will not be the same focal
length - like a 35mm lens on an APS camera, I presume.
I don't think they have OM adaptors, but. Don't know who their N.America
agent is - there is no agent here in Oz and they offered to sell direct.
Andrew



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