Originally posted by HoBykoYan i need to know which lens is the sharpest one...
Pentax K 55mm 1.8 (is it better optically than the Super Tak 55mm 1.8?)
Super Takumar 50 1.4 (am not sure which version yet)
Konica Hexanon AR 50mm 1.7 (i've read that this is a very sharp lens...)
I would say the Hexanon is the sharpest. The Pentax 55/1.8 would be my favorite: it's a great lens, with a beautiful rendering, but I can't say it's particularly sharp. The 50/1.4 is my least favorite, as it is really soft until F/2 - 2.8.
But come on, if you need the sharpest lens, buy a 50mm macro! These fast lenses are usually appreciated for other qualities than sharpness, because they are rather soft and low contrast when used at wide apertures, especially if you consider the borders of the frame. These old 50-55mm normal lenses also exhibit lots of longitudinal chromatic aberration. If you need nice bokeh, smooth colors and a vintage look, please do buy one of these, but if you need sharpness, you'd better look elsewhere.
Cheers!
Abbazz