>Yes, and the film format difference is driven by the size of the image
>circle. The 80mm f/2.8 Sekkor on my M645 is a much larger lens than the
>85mm f/2 Zuiko, even though it's slower by an entire stop. That's because
>the image circle is bigger and must spread the light around a bigger film
>frame.
So, if you buy one of those nifty Mamyia M645-to-OM adaptors and slap on a
Sekkor 80mm f/2.8, what do you get? It's still 80mm, but what is the maximum
aperture? f/2? f/1.2? What about that Sekkor 80mm f/1.9, the fastest medium
format lens ever made? What do you get? I can't do the math, to much
wine..........<hick>
Be seeing you.
Dirk Wright
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