loose rear lens cap

[Kirk Gittings]

Thank you!

[ROL]

if you had a loose plastic lens cap and wanted to tighten it up a hair what would you do?

Try a hair dryer

Certainly seems logical.

All seriousness aside – a lot of good solutions here to a minor annoyance I only thought I had (except for that scary looking hose clamp ).

[Arne Croell]

I fixed mine once by tossing the cap in some boiling water for a couple of minutes and then wrapping it with a wide, tight rubber band and leaving it for a few days. The tighter fit last for almost a year, then I had to do it again.

Yes, Brian is right. A minute or so in boiling water works fine, and is a bit safer than a hair dryer since you can't melt the plastic accidentally.

[aquamanaquaman]

I fixed mine once by tossing the cap in some boiling water for a couple of minutes and then wrapping it with a wide, tight rubber band and leaving it for a few days. The tighter fit last for almost a year, then I had to do it again.

[aquamanaquaman]

All the posts here were really helpful and got me thinking. I just had really good luck using JB Weld (an epoxy that you mix up in small batches, apply , then let set.)
I do a lot of work on cars, etc. and always have this stuff around. I just mixed up a dime sized amount, then used a paper clip to apply very small layers to build up material on the inside "threads" of the cap. I let it harden overnight. Then once it is set, just scrape away how ever much you may need to to get the cap on tightly to your liking. I just used this on an automatic lns cap on my street shooter. The fix is invisible. It won't be affected by temperature. And since I won't be taking this cap on and off, it should hold well, all without doing anything to my camera. Just adding material to an inexpensive plastic auto cap. JB Weld is pretty strong once set up. Very hard material. Good luck!

[Michael E]

I just had really good luck using JB Weld

I once fixed a torn oil pan with that. But isn't it too hard for a lens cap?

[aquamanaquaman]

I once fixed a torn oil pan with that. But isn't it too hard for a lens cap?

No. Because you are just trying to take up space where there would otherwise be plastic...right? Just use a little bit, just to take up a hair's worth f space.