On Mon, Dec 14, 2009 at 05:19:12PM -0500, John Sessoms wrote: > From: Boris Liberman >>> Larry Colen wrote: >>>> >> Have you carefully calibrated the focusing screen with all of your >>>> >> lenses? >>>> >> You may have just noticed it with the 1.2 because of the shallow DoF. >> >>> > On Mon, Dec 14, 2009 at 9:08 AM, Derby Chang <[email protected]> wrote: >>> > Yvon has this nifty chart you can download and print on card. Won't solve >>> > your problem but you can quantify it. >>> > >>> > http://pentaxdslrs.blogspot.com/2008/06/part-1-autofocus-adjustment-for-pentax.html >> >> I hear you. I've downloaded the charts. I am going to print them and >> try to measure my problem. Now - what do I do to effectively solve it? >> My conundrum here is that the lens is manual focus - so that >> everything here is purely mechanical - the lens, the focusing screen, >> the camera - no electronics involved. So what kind of solution am I >> looking for? > > May not have anything to do with it, but are you sure the diopter is set > correctly? > > I noticed back with my *ist-D that it auto-focused correctly, but when I > manualy focused it was off. Finally traced it to the diopter being set a > little wrong. > > Not so much I'd notice it looked odd in the viewfinder when I was in > auto-focus, but enough that when I focused in manual what looked sharp > through the viewfinder was just slightly out on the sensor.
That's not how the diopter correction works. There's nothing you can do with the adjustment to make an out-of-focus image on the focussing screen appear sharp. -- 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.
