[bojan]

Recently, I bought it on ebay, $40... Mechanically it is very solid.

Over weekend I tested it, optically it is quite good, but suffers from some fungus.

I didn't try to open it yet (there are some grab screws under the rubber ring, probably this will be the starting point).. does anybody have experience with it, who is manufacturer etc.
I couldn't find any info on web, so any hint is most appreciated.

Thanks in advance!