SMC Pentax 50mm f1.2 Filter Type_Polarizing and the autofocus is about

and the autofocus is about as good as you'd expect

with minor surface brightmarking and light scratches- nothing dramatic

It's equipped with a scale-focusing 75mm f6

for use with adapted classic lenses or in manual focus mode

since Sigma didn't see fit to build one in for some reason

SMC Pentax 50mm f1.2 Filter Type_Polarizing and the autofocus is aboutThe SMC Pentax 50mm f1. 2 lens is a hefty lens, but it's not a whole lot bigger than a f1. 4 there's just a lot more glass in there. This one is in very good cosmetic condition, with minor paint wear; glass has minor dust, no haze or fungus. Image quality is excellent a little soft at f1. 2, as you might expect, but it still looks great, and sharpens up nicely by f2 if you've decided you're buying an f1. 2 lens to shoot resolution targets.