Originally posted by awscreo Ugh, that's a lot to compromise for vintage glass I use occasionally
Not for me)
Ha! I should probably have put emphasis on the waffle words
For me it is not a matter of supporting vintage non-AF glass as it is attaining consistent hand-held focus with fast lenses. I bought my first Katz Eye because neither viewfinder AF nor focus confirm using PDAF nor manual focus using the stock focus screen were delivering the results I knew the lenses were capable of. The difference was night and day with the replacement screen. I must qualify, however, by saying that the Katz Eye required NO shim adjustment on the K10D. Doing that adjustment without live view would have been a royal pain. On current model Pentax cameras some shimming is usually required.
Just about every time I hand my camera off to a curious photographer friend, there is a quick "wow" comment regarding the screen followed by "where can I get one". As mentioned above, it is a real shame that Katz Eye is no longer in business. The good people at focusingscreen-dot-com make an excellent product that is superior to screens sold by eBay merchants. My suggestions from their lineup are the K3 (Nikon) and S-type. Another option might be
Beattie Intenscreen. Although they don't support any current model 35mm or APS-C SLRs, rumor has it that they do offer custom fabrication. According to their brochure, they also offer their "T-Mog" service to apply their screen brightening treatment to non-Beattie screens. A K3 screen with the T-Mog treatment may well approximate a Katz Eye with Opti-brite.
Steve