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who knows telescope


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Looking for some who knows telescopes we went out looking at garage sales today and I pick up a Celestron telescope for me a Marcella but it need to have collimation done to it. He gave me a collimation eyepiece but I don't have a clue what i'm doing. Anyone want to help me on this????

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Yep, that’s a Newtonian Reflector. Basically you fiddle with the three screws in the center of that smaller diagonal mirror (secondary) and the three screws on the bottom of the big mirror (primary) until everything looks concentric in the collimating eyepiece. There’s a ton of videos on YouTube that can walk you through it.

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