How can balsam separation between glued elements be fixed?
I'm planning to try to fix a couple lenses because what else am I going to do with them?
It's about looking nice, optimizing image quality, and completeness. One of the lenses (Tamron SP 28-135/4-4.5) had a stuck zoom (with four moving groups), oily elements, and sticky residue, as well as the usual grit and grime that lenses collect after washing ashore on the beach. (Why do so many lenses have sand in them?) All that's left to finish is to fix the balsam separation and calibrate focus.