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Fungus, Crack Or Neither?


liamlumiere

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Hi,

 

So while scouring the net for a nice Kowa I came across this one and noticed there was a slight discolouration in the optics. Seller sent me closer images and it's clear there's something in there. He says it looks 'gold in colour'. Not sure if it's fungus or even a crack or something benign, but worryingly, it's inside. Anyone recognise what it is? I have subtly marked affected areas with red arrows:

post-33922-0-67104800-1417487826_thumb.p

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Ok, but is it usable, fixable, cleanable? It's inside...

 

Should be usable as long as the surface in the center of the glass is clean. Anything around the edge of the glass usually affect the image the least, it's when issue arise in the middle of the glass will you start to notice anything different in the image. 

 

From looking at the lens and the input of eludes, it look like this Kowa has been serviced in the past. This meant that someone took apart the optics and put it back together through repair or a research disassembly and etc. As long as it's good glass there shouldn't be any problem really.

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the two moon shaped sides are a little separation.  the other is cement.  neither should effect the performance, - if any effect it might be that the opened optical faces might catch the light when flaring from off axis light sources.  the effects will be small but will drastically reduce it;s value if you ever sell it.  bear that in mind when offering the amount you do for it.  

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