No 1.4 lens out perform a 1.2 wide open. In fact they don't work at 1.2 at all. Usually however the slower lens will be sharper at mid apertures. There are however unit to unit variations in most lenses so a particularly good 1.2 may out preform an average slower lens.
-- graywolf http://www.graywolfphoto.com http://webpages.charter.net/graywolf "Idiot Proof" <==> "Expert Proof" ----------------------------------- Godfrey DiGiorgi wrote: > From what I've seen, I'd say that the 50mm f/1.4 lenses (A, F and > FA) outperform the K50/1.2, particularly wide open, but that some > users like the K50/1.2's rendering qualities. For that price, if it's > in good condition, it's certainly worth buying and experimenting with > at least. You can likely re-sell it if you are not satisfied for the > same or more money. > > For myself, I had several 50s and have settled on the FA50/1.4 as the > one I kept. I prefer to have at least an A series lens so as to use > all the body's exposure modes and decided that AF was an option that > posed advantages as well. > > Godfrey > > On Sep 13, 2006, at 8:01 AM, Subash Jeyan wrote: > >> yes, i have read up enough to know that with the M and the K lenses >> one has to set the aperture manually and that doesn't bother me too >> much. i was hesitating a little because i remember reading somewhere >> that the f/1.2 series, though more expensive are not as good optically >> as the f/1.4 series. >>> That is indeed a a K 50/1.2, and it is an excellent price. >>> However, be adviced that it will only work with manual stop-down >>> metering on the K100D. That doesn't bother many of us, but some >>> get the shorts in a bind over having to meter that way. >>>> need a little bit of advice regarding a lens. just came across what >>>> looks like a pentax k/f1.2. it just says "SMC Pentax 1:1.2 50 mm and >>>> from the very helpful bojidar dimitrov's k-mount lenses page, it >>>> seems >>>> to be the k/f1.2. > > -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
