Joe, I think you ran the test backwards. Depth of field is not the issue, depth of focus is. As focal length extends, depth of field decreases, but depth of focus increases. Try calibrating your 50-135 at 50mm, and then see how it does at the long end. I am starting to think that my long time eschewing of zoom lenses may not be such a bad thing though.
William Robb ----- Not following, Bill. At 135 mm the lens definitely was improved by a -4 AF adjustment. So if testing at some other focal length gives a different result, I will have soft images at 135 mm. 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.
