jenghan

I exposed my seriously yellowed Super Takumar 35mm f/2 to my LED lamp, kept them in close contact for 10+ hours -- the light emitter almost touch the lens.

And most of the yellowing were gone...

I've used an LED lamp to clear the seriously yellowed Super Takumar 35mm f/2, by kept them in close contact for 10+ hours that the light emitter almost touch the lens. Most of the yellowing were...