On Nov 1, 2012, at 8:40 AM, Boris Liberman <[email protected]> wrote:
> Reply interspersed... > > On Thu, Nov 1, 2012 at 1:26 PM, Paul Stenquist <[email protected]> > wrote: >> A couple of points in response: >> My DA* 60-250 failed after more than 30,000 frames and was repaired for >> $183.00. It's a fabulous lens, and , I believe, at least the equal of >> anything available in that range. > > Optically I totally agree with you. My brief encounter with it in > Chicago (thanks, Bob!) only confirms what you say. > > In Israel repair prices routinely are twice as those in US. So I'd > expect that fixing my DA* 16-50 would cost around USD 400. Consider > this, Paul - taking it to the service center will set me down order of > USD 70 only to have it checked. Granted if found to need repairs, the > repair bill will take this figure out, still it is not that cheap as > it is for you. > > Few years ago they couldn't find a replacement screen for my ZX-L. The > service clerk told that they hold parts only for gear that is no older > than 2-3 years... > >> My DA* 16-50 is sharp across the frame as far as I know. I've tested it for >> flat frame and don't recall seeing any significant deterioration in the >> corners. But I'll tray that again when I have time. I shoot all my auto >> interiors and engines with it and have never had a complaint. Quite the >> opposite, in fact. > > I can send you some full size JPGs or DNGs if you wish. It can be soft > towards the corners even way closed down... Could be it's having a > centering issue... I am not much of a lens tester - I just shoot. May > be this approach is not as good. > I generally don't test either, but I usually do a check of field flatness with a new or repaired lens to make sure I didn't get stuck with an incorrectly assembled unit. The only real way to test for corner sharpness is with a flat detailed surface shot wide open. It's not something that is easily observed in daily use, unless it's way out of spec. I'll shoot a brick wall of a tripod when I get a chance, but it's low on my job list right now. Paul > Boris > > -- > 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.
