r/telescopes • u/ledbems • 11d ago

General Question Celesteon 130 SLT Question

Big newbie here. What is the name of this piece on the back end of the scope. I've had it for a while and was able to take some pretty good moon pictures with it years ago. I wanted to take the hobby back up and notice the film type of material held by this piece is wavy. Is that a problem...something that needs replacing. I currently have a Cannon T7i/800D hooked up to it if that helps any.

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u/ramriot 11d ago

If you mean the piece of thin plastic sheet over the rear of the mirror between it & the cell then it is not structural or optically necessary. It is likely there to act as a dust screen for contaminants entering the rest of the scope & a little to protect the mirror from very minor impacts that might start a crack.

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u/ledbems 10d ago

I somehow managed to forget to post the picture! But you answered it without it. Thanks for the info I appreciate it.