on 11/20/01 2:26 PM, Bill Fernandez at [EMAIL PROTECTED] wrote: > At 9:44 AM -0500 20-11-01, Bruce Kinch wrote: >> >> Perhaps it's worth noting that Kodak now provides "curved field" >> projection lenses as standard for normal (cardboard, presumably) >> mounted slides in their Carousel projectors, but their older "flat >> field" design is recommended for glass mounted transparencies. > > BF: If memory serves correctly this has been the case at least since > the 1970's. Curved field lenses were standard, and flat field lenses > were special orders.
Actually, I think the problem is that Kodak's original lenses curved the opposite way the film did, exaggerating the out of focus edge effects. The flat field lenses corrected this to a much improved image. Accidentally showing a slide reversed often meant sharp corners, but writing that was backwards, etc. Jim (old-timer) Snyder
