Joachim123 Posted December 7, 2009 Share #1 Posted December 7, 2009 Advertisement (gone after registration) I have seen som M6's for sale with Chicken Pox in other words some of the paint on the top cover has bubbled. Does anyone know what this is caused by? If purchasing an M with this problem is the functionality in any way impared? Link to post Share on other sites More sharing options...
Advertisement Posted December 7, 2009 Posted December 7, 2009 Hi Joachim123, Take a look here Chicken Pox. I'm sure you'll find what you were looking for!
tobey bilek Posted December 7, 2009 Share #2 Posted December 7, 2009 Sometime during the late M4P run, Leica switched from brass stamped and machined parts to cast zinc alloy. If the alloy was not not perfectly pure, the metal would eventually have internal corrosion and disintegrate. They claimed their perfect quality control would prevent this from happening. Leter M4P were advertised as having M6 windows like it was a new "feature." Had I realized pot metal tops, I would never had bought two M6`s when they first came out. I did get lucky as mine are ok. So are the tops on my R6`s and R7`s . I have never heard of a problem with R`s. If Leica were a real company, the tops would be replaced to current owners free of charge for an obvious manufacturing defect. The windows were flush to the top as compared to previos m`s and later M`s when they went back to brass. Looking at the cameras, it is easy to identify zinc tops because of the flush windows. My guess is if you do not have a corrosion problem by now, they are ok. If they have spots, there is no cure short of a new top. Link to post Share on other sites More sharing options...
peter_n Posted December 7, 2009 Share #3 Posted December 7, 2009 I think the M6TTL was the most affected body. Functionality is not affected. Link to post Share on other sites More sharing options...
Alice MacRae Posted December 7, 2009 Share #4 Posted December 7, 2009 My 1985 M6 Classic has this problem--has bubbles on its back swing door. Just wondering if this is confined to this area only. Will it contaminate the other surfaces too? Link to post Share on other sites More sharing options...
rob_x2004 Posted December 7, 2009 Share #5 Posted December 7, 2009 I have never heard of a problem with R`s. You have now, with the R4-7 body. It isnt as serious as some of the M6 that had the full blown zincfrauss?sp? white pox, but it is still there. Along with the thick paint crazing in the mirrorbox is just another example alluding to steriotypical innuendo that suggests germans arent good with metals selections, paint or glues. As far as I am aware, Minolta never served these problems up to their customers. I dont think the corrosion unsettled the primitive electronics. Link to post Share on other sites More sharing options...
tobey bilek Posted December 8, 2009 Share #6 Posted December 8, 2009 Alice, it depends on the batch of metal. In all likehood, the metal on the back was a different batch and the problem will not migrate. I have two M6, Two R6, two R6.2,, two R7 and none have the problem. I have seen it on model railroad car trucks where they simply self destructed. Link to post Share on other sites More sharing options...
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