Canon Serenar 85mm f2 disassembly

[Dez]

I have just scored what looks to be a very good deal on the famous Canon 100mm f2 lens in LTM. To try to keep my excesses to a reasonable level, I now want to sell my lovely old Serenar 85mm f2 lens, which is considerably smaller and heavier than the 100. You could probably run this lens over with a truck without damage. Before I put in into the Classifieds though, I would like to clean some haze around the edge of an element toward the back of the lens, which necessitates removing the optical block from the focusing mount. It probably wouldn't be a significant impediment to image quality, but I'd like to get it right.
Usually I have no trouble doing a simple job like that, but I have not been able to figure out how to get get it out of the mount. I remember Brian Sweeney once mentioning that some Canon lenses are very easy to work on, and that this isn't one of them. I believe him!
Has anyone some advice on how to get that apart? If not, I'll have to list the lens, haze and all. This is NOT the usual place to find haze in a Canon, adjacent to the diaphragm, unfortunately.

Cheers,
Dez

 

[Dez]

I got very lucky. The crud was on the outside surface of the rear element, which, although a bit tricky to access for cleaning, is a lot easier than disassembling the lens. So it's all cleaned up, and in the Classifieds.

Cheers,
Dez

 

[Greg_E]

Yes this lens is different, need to get back inside mine and finish some work.