glass

Hello. I have a Celestron C9.25 Evolution and wonder if anyone has the 2 small screw/rivet like objects which are attached to the black band of the drum and to which the lens cover twists onto and held in place. I have one missing and the other broken.............................Thank you

Thanks Ricochet I have the 3x with no problem focusing but overall think the 2X will be better.

Thanks very much for your helpful replies

Which is better to use, a 3X focal extender with a 15mm eyepiece to give 5X magnification or a 2X focal extender with a 10mm eyepiece to give 5X magnification. Assuming all pieces are the same quality. Is there any advantage over brightness/sharpness or anything else. Also would a pair of focal extenders go well with binoculars with exchangeable eyepieces.Thanks...........................................

Very helpful information/advice over quite a few days from Martin at First Light Optics on my intention of buying a telescope from them. Eventually I bought it from another supplier but he appeared genuinely pleased I'd got what I wanted.