Originally posted by Erik The FA is
already tested as "one of the best 50/1.4 lenses of all time". I'm not sure that I need better than the best.
But that's just me obviously -- others will want the features the 55 has.
The weak spot of the FA 50 f/1.4 is the wide aperture sharpness. The DA Star 55 is especially made for super sharpness, even wide open, with mor care to the bokeh and different contrast and colour rendition to be "better than the best".
The DA Star 55 f/1.4 is really a shrinked down version of the FA Star 85 f/1.4 instead of being a modernized FA 50 f/1.4. (FA 50 f/1.4 has the same optical design as the M 50 f/1.4 and it has been around since the late 70's).