Apo-Rodagons

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P. Meschter - 05 Nov 2004 02:08 GMT

I have a 90mm. apo-Rodagon and have had the 80mm. apo-Rodagon N recommended
as a replacement. Aside from the slight difference in coverage, are there
any noticable differences in resolving power, contrast, ets? What is the
optimum working aperture for the 80mm?
Thank you.
Paul

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Bob Salomon - 05 Nov 2004 08:45 GMT

> I have a 90mm. apo-Rodagon and have had the 80mm. apo-Rodagon N recommended
> as a replacement. Aside from the slight difference in coverage, are there
> any noticable differences in resolving power, contrast, ets?

Yes

>What is the
> optimum working aperture for the 80mm?

2 stops down

> Thank you.
> Paul

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