20D - improved Katz Eye focsuing screen - Part 1/1

Started Aug 13, 2005 | Discussions thread
misha Forum Pro • Posts: 18,768
Re: 20D - improved Katz Eye focsuing screen - Part 1/1

Doug Kerr wrote:

Here is a brief summary of my observations regarding visibility of
the prism arrangement at different viewing apertures. The tests
were conducted with a Canon EF 50 mm f/1.4 lens.

Doug,

I thought the performance (darkening) of the split prism depended on the widest aperture of the lens at the given focal length - in this case it should always be 1.4 - or did you somehow set the camera to simulate the perfmance of a slower lens?
--
Misha

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