>> The 1.4 performs way better at f/1.4 than the f/1.7 does. :-) :-) >> :-)
> Not the 2 A50/1.4 that I had. The A50/1.7 was noticably sharper at > wide open. The 50/1.4 wasn't sharp until f4, similar to the > FA*84/1.4. My experience with some A 50/1.4's and A 50/1.7's differs. I found the A 50/1.4's to be slightly sharper at f/1.4 than the A 50/1.7's at f/1.7, and the advantage would continue at f/2, f/2.8, etc., until at about f/8 they would essentially be the same. Yes, I do know that resolution is not everything, but - http://www.cetussoft.com/pentax/resolutn.htm By the way, I also found that the A 50/2 seemed to be as sharp as the A 50/1.7 aperture-for-aperture (except at f/1.7, of course - <g>). About the only advantage I have ever seen for the 50/1.7 over the 50/1.4 was in field flatness (which seemed significant for macro shooting with the Vivitar 2X macro-focusing TC). I no longer have any 50/1.7's. When I want a 50, it's usually an A 50/1.4 that gets pressed into service. I can use the A 50/1.2 when I know (or suspect) I'll be facing really low-light conditions, and I also still have a couple of A 50/2's - they're not really worth trying to sell, and the ~A~ 50/2 is a surprisingly good lens, and it is useful to leave "kicking around" in the "workhorse lens kit bag" (it's sort of my "purgatory" for lenses - <g>) in the trunk of the car... Fred
