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Q : I’m trying to collimate my reflector but all I see at the back of my telescope is 3 Phillip’s-head screws. Where are the 2 sets of screws?
A : Your optical tube is probably covered with a metal back plate. The 3 Phillip’s-head screws are there to hold the metal plate in place. Loosen them and remove the metal plate. You should be able to see the back of the primary mirror and 2 sets of screws around it.
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