haze or dust?

[astrosecret]

Just discovered this today in a lens that I thought was clean. picked it up locally and didn't notice till I got home. None of my other lenses have dust that looks like this so i'm thinking it could be haze, but i've never seen it in person before. It does not appear on the surface of the rear element but seemingly on the element just behind the rear.

lens is the 50mm cron (rigid)

 

[ferider]

This is the typical vintage leica haze, probably on the surface behind the aperture. You can get to it by unscrewing the front half of the barrel. If you clean yourself be careful, coatings on the rigid are rather soft.

Roland.

 

[Bluedog2212]

Haze or dust

Haze or dust

I would ditto the careful post-sometimes an old lens actually gets etched by a combination of moisture and the metals present in the older glasses. I had one polished at Focal Point, looks pretty-it was not a coated lens, however. They can be re-coated, but I don't know what the new coatings would be