I picked up an old Minolta SRT101 with the 58/1.4 Rokkor PF for $40 at the Goodwill this past weekend. I already have the 50/1.7 so I'm not sure if I should keep this for $40 or take it back (I have up to 10 days to return). Below are some holiday test shots I've taken. Does anyone see any issues that my noob, untrained eye doesn't see? All shots are E-M5 handheld inside with natural light, and minimal raw PP in Lr4 (Huelight profile, highlights/shadows/contrast/presence tweaks, standard Lr4 sharpening applied). f1.4 | ISO 800 | 1/200 sec f2 | ISO 800 | 1/100 sec f2.4 | ISO 800 | 1/100 sec f2.4 | ISO 800 | 1/40 sec f4 | ISO 800 | 1/20 sec Even though these are all at ISO 800 I'm really pleased with the quality. I just don't know what I should be looking for to determine if a) this lens is a keeper (especially considering I have the 50/1.7), and b) it's worth $40. Any thoughts are greatly appreciated.