Ack! Sorry about the incorrect link. Here's the penny photo: https://picasaweb.google.com/lh/photo/uwNAmVlyxQAN1jadgOm1qNMTjNZETYmyPJy0liipFm0?feat=directlink or: http://goo.gl/2IOiC
> I'm sorry my Cosina is not living up to your expectations...but seeing > your rig I'm wondering about how insanely high your expectations might > be :-D Oh gosh, no no, I didn't mean to gripe about the lens or you or anything! I bought the lens because it was cheap, which was just what I wanted to be able to test out this rig. I knew it wouldn't be optimal for this kind of photography. > You can calculate the magnification power of your set up with a ruler. > Take a photo of it as close as you can, parallel to the ruler, and the > ruler running from side to side of the frame. Look at the image and > count how much of the ruler you've photographed. If you're using > millimeters, let's say your picture shows 12mm of the ruler. An APS-C > sensor is 24mm wide, so your magnification ratio is 12/24 = 0.5, so > you can say your macro capability is 1:0.5 (or 2:1 if you prefer). If > the image you'd taken was 24mm across, then your macro ratio would be > 1:1, or "life size", which is what macro lenses (such as your 100mm > f/2.8) typically reach. Awesome! Thanks for that. Now I will just have to see about finding a ruler with small enough increments. ;) John -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
