Hi! Godfrey DiGiorgi wrote: > Focusing screens with split image focusing aids are very sensitive to > being exactly on the lens optical axis for clean imaging with the > focusing aid.
I just got a reply from Rachael Katz herself. Boy, that was fast, and it is Sunday! It turns out that if I move my eye to the left and to the right ever so slightly (never thought of this direction) - it helps to bring the darkening to become symmetrical (both top and bottom portions of the split screen) and screen is indeed usable at least at f/8 in moderate tungsten light. I just tried it right now. My understanding is that I did everything properly up to the production tolerances. Most probably, I will simply have to use the screen extensively in order to get used to it. Nonetheless, I couldn't focus my A 50/1.2 at f/1.2 and be sure of the precision of the focus before I bought the screen. So undoubtedly it was worth it. Thanks! Boris -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
