taking apart summitar elements

[bukaj]

I've noticed what looks like some yellowish fog between the front two elements of my summitar. I want to see what it is, and if I can clean it. There's also some specs of dust. How do you separate those two elements? They seem to unscrew as one piece (where the lens would be open to the aperture blades). It looks as if they should unscrew as well, but I haven't had luck.

thanks,
-jakub

 

[Ronald M]

Yellow fog is probably a failed balsam cement in a cemented group.

Isolate the elements, finish separation with heat, clean, re cement.
Not an amateur job.

Focal Point Lens.com John will fix it up for a price.

 

[StevenJohn]

The worst part is, the cemented element group is peened in place. It's more involved than unscrewing.

 

[bukaj]

Looks like I'll just let it be for the time being. Don't notice anything odd on the photos I've taken with it.