Rokkor MC28 2.5 yellow tint

[memetph]

I just bought a Rokkor MC 28mm 2.5 . After some test shots I notice a yellowish tint. I can remove it with LR but I think that I am also loosing half a stop.

I read that the element which is radioactive is in the middle of the lens and it makes the removal of the tint more difficult.

Does anybody has some experience with this ?
Is there any method without sunlight ?

Thanks for you help.

[DigiChromeEd]

I have the same lens and solved the yellowing problem like this:-

http://forum.mflenses.com/fast-lens-de-yellowing-without-a-uv-lamp-t68896.html

A year later, it's still as clear as a bell.

[memetph]

Thank you very much !!!

[Lightshow]

I've just started a test with a compact fluorescent(CF) bulb, since they do emit some uv, it should work in theory.
I had previously attempted curing my MC SI 28/2.5 by exposing the front side to the sun and tinfoil in the rear cap, it did get better, but not much, so I'm going to try the CF on the rear elements and see if there is a change over night, and then the nest few days.
I never really found my lenses yellowing to be a problem.

[stevemark]