^
All of them are pretty close or near in photo-quality output. Newest V version is very compact and probably the best overall. Although older ones are very sharp with outstanding optical performance. In the beginning I didn't like Mir 1's but after little bit of use I think it's one of the best (if not the best) 37mm lens out there.
My favorite is Mir 1A. (spring-loaded dual like aperture, 52mm vs 49mm filter/hood thread and can closer focus then any mir 1 version)
Last edited by fiveseven; 02-24-2013 at 04:11 PM.