In a message dated 10/7/2007 9:18:50 A.M. Pacific Daylight Time, [EMAIL PROTECTED] writes: At f3.1, (maximum aperture for this lens at 100mm) and 2.6ft, (minimum focus distance), the DOF is about 6.8mm according to my DOF calculator. I focused on the leading edge of the furthest right petal on the semi circular group of petals in the lower right center. I should have probably focused about 3mm further back. I think it's not bad for hand held. The fact that the leading edge of the cupped petals to the lower center right. and the purple-pink tendrils to the left are relatively sharp, (though the rolled up petals at the bottom center may be sharper), is pretty good performance for a lens at it's limits)..
============ K. You'd know better than I. Much better. If my pictures look pretty sharp then I am happy with my own lenses (not really knowing how to test). But, yeah, you probably should have focused a tinsy bit further back. Later, Marnie --------------------------------------------- Warning: I am now filtering my email, so you may be censored. ************************************** See what's new at http://www.aol.com -- 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.
