How big is that pipe? At 1/4th life sized (assuming it's a few inches long) you get ~1/2 inch DOF at f 8, f 11 should accommodate it nicely (unless that is one small pipe.) You may need to focus carefully to use the whole DOF range, which is starting to get more evenly split in front and behind the focal plane even at 1/4th lifesized. So you may need to focus till the point 1/2 of the way in is sharp and let DOF cover both the foreground and background. (Focusing like that is not exactly say but for a non-moving object it's not hard. put something next to it the comes into focus at the desired point.)
-MCC At 03:20 AM 4/10/2002 -0400, you wrote: >In order to gain reasonable DOF using a A-100mm/2.8 and the A*-200mm/4.0 >macro lens, I imagine that I'd have to stop down quite a bit. However, >I don't want to lose much, if any, sharpness. Any thoughts on the best >aperture to use on these lenses? Do they defy the laws of physics and >maintain good resolution and sharpness when stopped down to f/16? >One object I want to photograph is about 1/2-inch deep, and is rounded >in shape. I'd like to capture that as much as possible, as well as >surface details, such as scratches and engraving. The item is a small, >brass hash pipe, if that helps. What do you macro shooters do when you >want good DOF and good surface detail? Here's the object I want to >photograph. Suggestions gratefully accepted. > >http://home.earthlink.net/~belinkoff/temp/pipe.jpg >-- >Shel Belinkoff >mailto:[EMAIL PROTECTED] >http://home.earthlink.net/~belinkoff/ >http://home.earthlink.net/~belinkoff/darkroom-rentals/index.html >- >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 . - - - - - - - - - - Mark Cassino Kalamazoo, MI [EMAIL PROTECTED] - - - - - - - - - - Photos: http://www.markcassino.com - - - - - - - - - - - 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 .
