m42 lenses - Helios 44-4 help

[ryanbarlin]

So recently I bought a couple of m42 lenses and adapter.

I'm a little confused with this this stuff. I thought I had it researched, but turns out there's variants of the Helios 44-4.
Some of these hit the mirror on the 5D Mark II, but there's conflicting info out there. I just want to double check before I mount it which version I have?

Here's the ebay listing:
http://www.ebay.com.au/itm/310736701387?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649

I have a sneaking suspicion I bought the wrong one. :(

I'll be using a Fotodiox m42 to EOS mount, if that helps.

[jjphoto]

I can't help you with the Helios, but I've had lenses strike the mirror on a 5D2 and have never had a serious problem or damage of any kind.

IMHO, one reasonably safe way to test is to put the 5D2 in Live View mode to raise the mirror, then fit the lens with the mirror raised, then turn off Live View so the mirror drops down. If the mirror catches on the lens you will soon know it but it will simply sit on top of the lens and the mirror mechanism won't be damaged. If you remove the lens the mirror will drop down. The mirror could scratch the rear lens element, but I've not had that happen.

No guarantees however, you always do this stuff at your own risk!

[ryanbarlin]

Ah, thank you, this cleared a few things up.

The seller wasn't sure which variant I have, so i've asked on another board as well.
If i've got the wrong one, it's back to ebay for me! :D