Hi Folks,

Sorry to start a thread just for this but all the information I can find is to do with slip on filters.

I've lost the original retaining ring from when I borrowed a lens and I'm struggling to work out what size I need. I saw something about how they didn't stick to standard sizes so I'm not sure.

I'm hesitant about buying the wrong one because of how long they take to arrive, I want to get shooting!