The AF sensor apparatus is in the mirror box behind the mirror, but the metering sensors read the light coming from the focusing screen.
I tested my *ist DS KatzEye screen in the K10D. At that time, there wasn't a dedicated K10D screen available yet. The K10D demonstrated an average metering calibration shift such that the exposure was off by 0.7 EV on a standard metering target (gray card) in all modes. I talked to Rebecca Katz about this. My decision was that I didn't need a screen given the K10D screen quality. Rebecca and company might well have done some revisions to the K10D specific screens since then. Godfrey On Apr 7, 2008, at 12:40 AM, [EMAIL PROTECTED] wrote: > The metering and AF would never be affected by focusing screens, since > it's done 'behind the mirror'. > >> It seems, putting a DS/Katzeye scrren in a K10D (and K20D I >> suppose, I >> do not expect any change there) would cure (at least up to a certain >> point) the metering problems with K/M lenses and provide a situation >> comparable to D/DS etc bodies. >> >> It also provides microprism if so you chose but it might as well >> degrade the metering performance with A/F/FA/DA lenses. >> >> Tough choice IMO... -- 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.
