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I bought a focusing screen on ebay a 'Trevor' diagonal split screen. Installed the sucker ok. But now there's a problem.. The focusing is waaay off. I tested with about 5 lenses. The autofocus, focuses correctly and the image is still split! When I align it, it's out of focus.
If that wasn't weird enough, aligning the split screen with one of my lenses actually does focus it.... so.. what's going on? Is the split screen meant for a different camera or something? Anyone know if there's anything I can adjust?
I should mention, I have a k2000 and this is the screen i bought:
http://cgi.ebay.com/O5O2-Dual-45-Split-Focusing-Screen-Pentax-K2000D-/270510722935