TELESCOPE Crayford Focusers: A History And Demonstration (How It Works) ( by #reflactor )
19:41
TELESCOPE Crayford Focuser Restoration (by Reflactor)
11:38
Why upgrade your focuser? Omegon Newtonian dual speed Crayford Focuser Review
18:45
Telescope Back Focus: The Ultimate Guide [TAIC Short]
30:57
Flock Your Telescope Black - Telescope Fix & Upgrade Challenge (PART 3) Reflactor
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I had NEVER heard of this focuser! Let's put it to the test 😇 Astroasis Oasis Focuser
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How To Use a Dobsonian Telescope
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Collimation Made Easy Understanding Collimation
31:35