On Feb 11, 2011, at 9:32 AM, Luiz Felipe wrote: > Larry, you and Paul got me thinking about a test with Yvon's AF target - just > to make sure there is no micro shift made evident by the 1.4 aperture. I > understand the 1.4 lenses got slightly worse results wide open than the 1.7, > and my rather crude tests point in the same direction. If you get to test it, > post the results, ok?
OK, here are the test photos I took, most of them I just cropped in very tightly on the center of the frame: http://www.flickr.com/photos/ellarsee/sets/72157626026902326/ I did a couple of runs through, trying slightly different things. These do not include the photos taken with the teleconverter. F/1.4 nearly full frame (just rotated slightly) http://www.flickr.com/photos/ellarsee/5436573823/ f/2.8 nearly full frame http://www.flickr.com/photos/ellarsee/5437186466/ f/1.4 cropped in tight: http://www.flickr.com/photos/ellarsee/5436572699/ f/1.8 cropped in tight http://www.flickr.com/photos/ellarsee/5437184414/ f/2.8 cropped in tight http://www.flickr.com/photos/ellarsee/5436574987/ The last of test photos were done at 1/180 second, using the af540 on p-ttl with a water bottle diffuser off camera to the right. > > Of course I'd still go for the slightly OOF pic, as opposed to the words > describing the UFO. What happens on the UFO, stays on the UFO. -- Larry Colen l...@red4est.com sent from i4est -- 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.
