Hi Joe (and Cotty too, thanks for the encouraging words :P), I did some more testing with my K10D and DA* last evening shooting the brig wall of a nearby building and other subjects near infinity.
It appears that at 16mm the lens is not focused all the way to infinity but the resulting pictures of remote objects are still as sharp as they can get (well within DOF) even at f2.8. This is my first autofocus wide angle lens (or wide angle zoom) so I don't know how they are supposed to focus with af body. Then later last night I realized I usually do the same with film bodies and SMC 15/3.5 as my K10D now does with the DA*, I set the focus at a suitable point (not at infinity) to get a larger DOF. Some things you do automatically you don't even realize you're doing. Focusing the DA* manually did not give any better results. I compared the autofocused 16mm shots with pictures of the same subject at the same distance taken with my manual focus wide angle lenses set at infinity. All I can tell is that the 16mm seems sharper than any of the old primes! Quite a performance from a zoom lens. Ok, I know it is optimized for DSLR but still... It seems to take a while getting used to the silent SDM. Antti-Pekka ________________________________________ Antti-Pekka Virjonen Computec Oy R&D Turku www.computec.fi > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On > Behalf Of Joseph Tainter > Sent: Thursday, March 27, 2008 3:45 AM > To: [email protected] > Subject: Re: K10D (V1.30 firmware) and DA* 16-50/2.8 focus problems > > "It seems that my K10D does not focus correctly at infinity but > instead > focuses a lot closer when shooting landscapes for example (front > focus?). This seems to happen more at the wide end (16mm) of the > lens. > Shooting portraits or other subjects in the few meters range the > focus > seems to be right on." > > This is the same problem I have had, and others have had as well. > My > problem shows up with the lens on the K20D at 16 mm. On the K10D at > 16 > mm it focuses to infinity correctly. > > I was advised to send both camera and lens to Pentax. You will > probably > need to do the same. > > Joe > > -- > 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. -- 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.
