On 2/4/06, John Francis, discombobulated, unleashed: >What sort of test did you have in mind? >I've got the Pentax 77mm and 112mm filters, and one prime and one zoom >that take those filter sizes. But I probably don't have a tripod that's >good enough to produce meaningful test results.
Basically, on a tripod with a cable or remote release, lens with filter, focus, mid-range aperture (5.6 or 8) shoot. Remove filter, *don't* adjust focus, shoot. Compare results. Uh, I think. Cheers, Cotty ___/\__ || (O) | People, Places, Pastiche ||=====| http://www.cottysnaps.com _____________________________
