On Nov 6, 2010, at 10:32 PM, Miserere wrote: > On 6 November 2010 22:18, paul stenquist <pnstenqu...@comcast.net> wrote: >> >> On Nov 6, 2010, at 10:02 PM, Miserere wrote: >> >>> On 6 November 2010 21:42, paul stenquist <pnstenqu...@comcast.net> wrote: >>>> I adjusted the camera for all six of my autofocus lenses this morning. i >>>> did it with the target I've used before. The moire method sounded even >>>> more difficult and time consuming. In any case, five of the six came in at >>>> 2 or 3 clicks in one direction or the other. None were dead on at zero. >>>> That's less deviation than I saw with most of my other Pentax DSLRs. >>>> Similar to what I saw with the K-7. One lense, the FA 35/2 required a + 10 >>>> adjustment. I believe the K-7 number for that lens was way up there as >>>> bell. I'll have to have a look. I double and triple checked most of them. >>>> Checked zooms at full zoom and half way. If there was a discrepancy, I >>>> leaned toward getting it right at the longer focal length, since DOF is >>>> reduced. I'm now happily dialed in. >>>> >>>> Paul >>> >>> How is the manual focusing? Do you need any shims to sort it out? >>> >>> >> I haven't tried manual focus. I do intend to head out in the woods with my >> A400/5.6 some time soon. And I'll check it for infinity. I suspect it will >> be okay, as it has been with the k-7. The only other manual focus lenses I >> use are a K85/1.8 and a Vivitar S1 90/2.5 macro. Haven't experienced >> problems with any of them on my earlier Pentax DSRs, although I never tested >> them specifically for infinity focus. They're not the kind of lenses one >> normally uses at infinity. >> Paul > > I wasn't worried with infinity so much as with accuracy in general. I > recently had to shim my K10D because AF was spot on but manual focus > back-focused. > > I'm sure your camera will be fine, but I was curious nontheless. I'm > sure Boris will chime in with his tale of woe getting correct manual > focus on his K-7. > > I get it. You're talking about focus screen accuracy. Good question. I think I'll test for it with one lens. The 85/1.8 wide open will work for that. Paul > --M. > -- > > \/\/o/\/\ --> http://WorldOfMiserere.com > > http://EnticingTheLight.com > A Quest for Photographic Enlightenment > > -- > 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.
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