on 05.12.03 19:42, R�diger Neumann at [EMAIL PROTECTED] wrote: > on dpreview is a long thread about the focus problem on fast lenses. > > http://forums.dpreview.com/forums/read.asp?forum=1028&message=6551761 > > It is stated, that the AF is not correct for lenses like the FA 1.4/50, > FA*1.4/85, FA*2.8/28-70 and so on for aperture values less than 4. > > Has anybody of the *istD user has also this problems.? > Boz discriped a method to test it: > http://forums.dpreview.com/forums/read.asp?forum=1028&message=6702007 > > I'm a bit concerned, as I'm thinking of buying a *istD. I have a lot of fast > lenses like the FA2/24, FA1.9/43, FA1.4/85 ... and I would like to use them > wide open with AF. > Hello R�diger, I've made some tests at home this weekend. I've used FA 100/2.8 macro and FA 35/2 - both wide open, *istD on tripod, halogen light, iso200. And for about 30 shots per lens at min. focusing distance and at about 1.5m, only two were misaligned about 2cm with FA 100/2.8. I've made a few shots focusing manually using matte only - these were worse misaligned (slightly front or back focussed) than the ones made using AF... And I have had perfect sight since I was born :-) My conclusion is: focusing problems with *istD are exaggerated, it is rather difficult to obtain better results during action manually focusing at shallow DOF, and if you want top focus on stationery object, than you have time to use MF anyway. Enjoy your cameras, taking all these great photos, until you want to eat your nails ;-)
-- Best Regards Sylwek
