If I can add my two cents. A couple of years ago when this discussion
was going hot and heavy Gary Reese produced a test slide for a slide
projector. I was quite disappointed in the performance of my Leitz
projector with the Colorplan 90 flat field lens. I remounted the slide
in a glass slide mount and found that I could determine no difference
in performance. Gary suggested some extra steps in set up to maximize
the quality of the projected image, but I found it was beyond what I
wanted to go through. And digital display came along and I did not
worry about it any more.
Winsor
Long Beach, California, USA
On Nov 29, 2004, at 5:06 PM, John A. Lind wrote:
> Technically this is correct. In practice, I've never noted any
> significant
> difference between FF and CF regarding focusing a slide properly
> across the
> field. What I have noted is CF lenses typically falling in the
> inexpensive, slow consumer category. The Kodak in particular are
> optically
> mediocre. The FF lenses typically fall into the more expensive
> commercial/institutional category; they're faster and optically better
> performers. Even so, I'm still not all that impressed with Kodak's
> upper
> line except perhaps their build quality which was definitely more
> robust
> for heavy use compared to their consumer lenses. OTOH, Schneider
> makes (or
> made) some quite stellar lenses, and a few of them weren't that salty
> (although a large number are [were] quite expensive).
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