Which has better optical performance despite the aperture number. Your thoughts, own experience with the lenses, perhaps is appreciated.
Thank you. ----- Roman, I once compared the DA 40 to the FA 50 F1.7. This was a systematic test, on a tripod, at a range of apertures up to F11 (if I recall correctly). The subject was a mud-brick wall, at a distance of about 40x the focal length of each lens. The result is that they are very close in sharpness. At Actual Pixels I found the FA 50 F1.7 to be just a bit sharper, but you have to go to a high level of enlargement to see that. For practical purposes, they offer comparable image quality. I think you would find a comparison to the FA 50 F1.4 to be about the same. So whichever you decide, you will get good image quality. There are other factors that distinguish these lenses, especially speed vs. compactness. Those are what you should evaluate in regard to your shooting needs. Joe -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
