normclarke Posted January 23, 2014 Share #21 Posted January 23, 2014 Advertisement (gone after registration) Early M4's did have the canada balsam in the main prism, I had one. I found it quite easy to repair using a local source to do the coating. The prism was reassembled using a U/V curing resin designed for the space industry, it worked perfectly. The trick is to get the coating to the correct transmission which is between 70/30 and 65/35. Best, normclarke. Link to post Share on other sites More sharing options...
Advertisement Posted January 23, 2014 Posted January 23, 2014 Hi normclarke, Take a look here Resilver rangefinder patch. I'm sure you'll find what you were looking for!
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