On Jan 10, 2011, at 10:49 AM, Godfrey DiGiorgi wrote: > Of course, the big question is "Is the image on the focusing screen > critically focused?" The standard way to test this is to use a locked > down camera and focusing target with a high-magnification viewfinder > accessory to determine that the image is critically focused on the > focusing screen and a target where the focus variance is easily > discernible. It sounds like you're trying to achieve this with your > test ... which means that if the camera is consistently off, through a > few tens of focusing attempts at a few different focusing distances, > then screen to sensor alignment may well be the problem.
Thanks, Godfrey. I'd love to find out that that is the case. My attempt at approximating a "critically focused" test was was only a few shots at one distance. I'll do some more, but will have to find an appropriate location for doing some longer distance focusing. Much more than my attempts here yesterday -- again, six or seven feet -- won't be possible here in my unit. Quiet day here in Atlanta so far. Haven't ventured out, yet, but looks like six or eight inches of snow on the ground. Not a big deal to those of you who are used to that on a regular basis, but it pretty much shuts everything down down here. ------------------------------------------------------------------------------------------ Eric Weir Decatur, GA USA [email protected] -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
