fotografiasol

I think it's a very relevant consideration

By the way, mine Biotar looks like it was never open.

I also have a Biotar 58mm f2 with the same situation. Please, could you tell the serial number? I guess there is the posibility of the existence of old M42 lenses with diferent register.

Placed 59^th in the challenge.

Placed 39^th in the challenge.

Placed 73^rd in the challenge.

https://www.dpreview.com/challenges/Challenge.aspx?ID=11875

Not exactly. Not every Helios-44 has ist own particular flare-gost color, but non MC Helios tend to show an orange gost, as seen in the example at wikipedia. But there are Helios 44-2 which are ...

My experience with 15 Helios. Perhaps no particular model is the best. They are diferent. First, good shape is important. Second, the Helios 44 and 44-2 tend to be good, the high number of not too ...