Zeiss Biogon M query

[mike_j]

Zeiss Biognon wobble
I have just received a Zeiss biogon M 28/f2.8 bought on ebay. Condition is good but there is play on the front of the lens. It has a looseness both radially and vertically which does not seem appropriate for a lens of this class or price. Is this normal - or have I bought a dud to be returned asap?

Results fom the lens are OK, it's just the feel and handling which are wrong

 

[f16sunshine]

Sorry mate. That is not normal behavior for a Biogon. There is some QC issues to recon with with ZM lenses. Afraid you might have found one. Return and buy another. You will love that 28. Excellent performer.

 

[FA Limited]

is it this?
http://www.rangefinderforum.com/forums/showthread.php?t=79134

 

[sebastel]

if it is the rather-often-reported "wobble", it's very easy to fix by tightening the lens group nut (which is actually just a thereaded ring) from the mount side of the lens.

 

[kully]

My 28/2.8 has the same thing, and when it got worse searching revealed it is, although not an epidemic, common.

 

[mike_j]

Thanks guys - easy fix when you know how!

The question now is whether to risk a minute drop of LokTike from a needle point to stop it happening again.

I still think the ebay vendor knowingly sold what he though was a faulty lens though. Cavat emptor as they say