Originally posted by r0ckstarr Is there a preference over which one is better? I've never had one and am considering finding one. Just want to make sure I don't end up with the wrong one.
Personally I prefer the M39 version (so far). It has 13 blades and pre-set aperture, but no MC.
But there are many different versions available -
Complete list of Helios lenses - getting closer
My eBay experience was that it's better to pay a little more and get this lens in relative (considering its age) good optical and mechanical condition than buy some junk (and there's lot of junk on eBay when it comes to Helios-44, believe me).
This could also be useful:
there were two product lines:
1. pre-set line: 44 (13 blades) -> 44-2 (8 blades) -> 44-3 (8blades + MC)
2. auto-line: 44M (8 blades, A/M switch) -> 44M-4 (removed AM switch, reduced number of blades -> 44M-4 MC (better resolution, MC layers). Following versions only increased resolution.