Paul - Thanks for passing along the info. I know at least one other camera manufacturer is doing the same thing. It won't be long before it's a must have feature.
I find it interesting that just a few years ago it would be unlikely that we would have found these differences and even less likely that we would do much about them. I do remember the stories of photographers buying several copies of a lens and keeping the one they thought was the sharpest. Few went to that much trouble. Now, it's easy to detect and fix. GS On Wed, Mar 5, 2008 at 5:58 PM, Paul Stenquist <[EMAIL PROTECTED]> wrote: > So far I've adjusted the FA 50/1.4, the FA 35/2 and now the DA > 16-45/4. The 50/1.4 came in at -4. I retested to make sure. Same > result: -4. The FA 35/2 came in at +2. Tonight I did the DA 16-45/4, > and as I suspected, it was closer to dead on at just +1 adjustment. > > I simply do a series of shots of crisp typography off the tripod, > wide open (or just slightly stopped down) at seven or more adjustment > values. I use single point, center autofocus. I convert each shot to > a full-res 16-bit file, line them up on the monitor, then pick the > sharpest one, based on the letter where the center point autofocus > fell. It's easy to see the sharpest at 200% of full resolution. I can > check a lens in about fifteen minutes. > > I like this feature. But the lens-to-lens variation I'm seeing also > explains why Pentax went to this lens-specific adjustment. I'll bet > that in trying to address the complaints of K10D owners they realized > that adjusting focal point for one lens didn't necessarily make the > camera correct for every lens. I think we have a very good thing here. > Paul > > -- > 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.
