For me, I am interested in relative lens tests: How far down do I have to stop a lens before it hits a point of diminishing sharpness return? At what f stop does this zoom come close to that prime? Is lens A better than lens B? That sort of stuff. I never bother testing lenses stopped down past f8. After a while, and looking at film from many lenses you get a feel for the good and not so good lenses. Keppler is always pushing the latest, greatest, wide range, light weight, wonder zoom lens. Then go test it at f22 with 400 film. See, it gives pro results! Like you're really going to see any difference between lenses with a floppy tripod, at f22 with 400 film. One of the hardest things was getting something with enough magnification to see what was really on the film. I recently got a solution to that problem. They were throwing out a Lietz 10-30x stereo inspection microscope. It was way too big and heavy to walk out the door with, but I did retrieve the head. I kludged up a base, and now I can really see what I have.
From: "William Robb" <[EMAIL PROTECTED]> This begs the question: How many people are satisfied with their lens because they haven't seen a sharper one? How do you know if your lens is sharp enough if you haven't compared it to a known really sharp lens? William Robb - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
