Originally posted by onlineflyer I've been looking for a fast 50 and have a question regarding older f1.2 lenses versus the newer DA 55 F1.4. Since i'm more interested in photographic output, namely rendering and exquisite bokeh , auto-focus is not a consideration. So, what is your recommendation?. Furthermore, does anyone have a hands-on comparison, or provide insight into what I might expect the difference between the two might be? Any and all input is greatly appreciated.
You already received good advice. Let me share a different perspective since AF is not your priority.
I have three fast 50s: Pentax FA50mm f1.7, Pentax A50mm f1.2 and Voigtlander Nokton 58mm f1.4. Of these, I rarely use the FA50mm f1.7, because the other two have much better IQ. The A50mm f1.2 is an excellent lens, but the VL50mm f1.4 is my preferred one. The VL 58 mm f1.4 is a metallic lens, built like a tank, with great IQ and outstanding results. It is an amazing lens, particularly in poor lighting conditions. Not just low light, but also smoke, fogg, smogg.... I shared a few experiences at:
FA31mm f1.8 vs VL Nokton 58mm f1.4 - PentaxForums.com
I rate my copy of the VL58mm f1.4 as being very very close to the FA31mm Ltd and FA77mm Ltd lenses in terms of IQ. The VL58mm is my most used prime lens when I travel, because it can cope with many different conditions: not just light conditions, but also weather conditions. The lens is not officially WR, but is is built like and perform like a WR lens IMO. If i have to take one prime (only) for a trip, it will be the VL58mm f1.4.
I can highly recommend the VL58mm f1.4 if you want great rendering and fast lens at 50mm.