Originally posted by nickthetasmaniac sticking with M series glass has the benefit of sharing 49mm filters across your whole kit.
The K series has 52m filter threads in general. Now I prefer K series, but I can't really explain why. I read about better IQ with K series, but I couldn't check it. Size is not an issue with these lenses I think.
Originally posted by Vendee Speed isn't everything. The K35 f3.5 is sharper. In fact I would say that my K35 F3.5 is probably the sharpest lens I own and I've got some faster Pentax primes and some expensive Canon L class lenses.
I really like the 35mm FoV and I do much more portrait work than anything other, so speed is important for me. Does the sharpness difference visible on film too?
I wouldn't like to use MF glass on DSLRs. I wear glasses and I does not see what's in focus with modern viewfinders. In LV the KP needs too much batteries for a day, so I stick to high end AF lenses.
(I tought my LBA would be cured after getting F2.8 AF zooms from 16 to 135 and from 10 to 300mm plus AF primes from 15mm to 200mm, but now I would like some manual glass...)