Broken Lenses. What to do about them?
Lenses don't fail often; but they do. As of yesterday I have two on the critical list and one on the "too far out of range to AF-Tune correctly" List.
One is an older 55mm f2.8 ais Nikon micro lens. It has an affliction that seems to strike a number of these older lenses; oil or lubricant has seeped from somewhere onto the aperture blades and made them "sticky." As a result the camera doesn't stop down and then over the aperture open back up again. For the most part it's stuck in the wide open position.
I took it in to be repaired but apparently there is a part that breaks 50% of the time and that part is no longer made. The cost of the repair would be about the same as the cost to replace with another used copy. I gave up and decided to buy a nice, older 55mm f3.5. It seems to be a good performer. It was under $100. Less than the projected repair...
The second lens is a Nikon 20mm f2.8 AF that I bought used, hoping it would be all I ever needed for my wide angle stuff on the full frame Nikons. It developed a weird, de-focused, whirligig pattern on the corners and edges; nothing sharp until the center third of the frame. I think I understand the problem. One of the lens elements (or groups) seems to be loose and rattling around. I'm taking it in to see what the repair techs can do but I don't have high hopes.
Finally, there is a Tamron 28-75mm zoom lens for the Nikon that I want to love very much. If I focus it in live view it's sharp, sharp, sharp. If I let my camera take care of business and use the regular auto focus then it back focuses like crazy. I'm on old veteran of AF fine tuning so I set up my target last night and got to work. No dice. Even a minus 20 correction (the max correction on a D800) is nowhere close to budging the focusing plane into compliance. I'm taking that one out to the repair experts to see if there is a way to re-calibrate it into a useful appliance. Again, I'm almost certain that the cost to manually disassemble and fine tune the lens will exceed its used value.
All of which begs the question, "Once the value of a lens has been sucked dry by accident, aging or other decay, what should one do with it?" It seems sacrilege to send it to the landfill and yet who wants to crowd their space with more stuff that doesn't have a function?
This is not a rhetorical musing. I'm very interested. What would you do with non-functional, non-repairable lenses? Thoughts? They are not big enough to turn into interesting lamps.....