I have a yellowed SMC Takumar in M42 for my Spotmatic. I love the lens for b/w, but I want to shoot color with it and I find the yellowing drops probably a full half-stop from getting through the viewfinder (which at my age is increasingly a problem).

I could just set it out in the sun as such: http://www.apug.org/forums/archive/i...p/t-41848.html

But, is there a better/faster way to get UV on it?