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

Started Aug 13, 2005 | Discussions thread
Rachael7 Forum Member • Posts: 82
Re: what about the microprism collar?

PaulyOly wrote:

I have the haodu screen and with the 400 f5.6L the collar is
unusable. The split prism still works, but half can black out if
your not looking at it straight. The worse part is the rest of the
screen is much darker than the stock screen when using this lens,
the center circle with the collar and split prism is still pretty
bright though, but the collar is very distracting when using an
f5.6 lens.

On the Katz Eye™ Plus screen, the microprisms are slightly enhanced as well, although it is not AS enhanced as the split prism area. The collar should be useful at f5.6, but it will exhibit some "reticulation", to borrow a term from Doug Kerr's analysis. In other words, the triangular microprisms will not go entirely clear even at perfect focus when your aperture is that small. So you may still find them distracting, but they shouldn't be entirely dark. I hope than answers your question.

Rachael

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