Smolley wrote:
I keep buying these adapters, but can't get the one I want.....I need a C-
mount ( 0.965" external thread) to (0.913") 23.2mm clamping eye piece
tube. any thoughts....

One thing I would warn about this style of adapter,
is if they're constructed of metal, they leave some
play in the threads, so the item will not jam up
when screwed together.

There is sufficient play, that you cannot get a
good focus from the optics. Maybe you get it set up,
it merely touch the steel part with light pressure,
and your focus is thrown off.

I would suggests some other material choice, such that
when the threads engage, they're more of an interference fit.

I discovered this, from some parts I bought years ago, and
never could get the setup rigid enough for it to keep the
focus I'd applied. A little tap here or there, some incidental
contact and the focus would be off.

Paul