Quote Originally Posted by mnemosyne View Post

Stay away from Russian lenses.
This is a blanket statement made without a single supporting piece of evidence to back it, and is thus not very useful.

There are plenty of people, as even the most cursory search will show, who have had no significant issues in their use of Soviet LTM lenses. The limitations are well-known, and certainly they are not without some degree of risk (which can be mitigated by purchasing from a trusted source, as is the case for any used equipment), but they are not universally poor by any stretch of the imagination.