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Model: ae_colli_cap
A simple, convenient and affordable means of collimating a Newtonian telescope.
Normally when you look down a telescope focuser drawtube it can be hard to tell exactly where to place your eye. When using a collimation cap you will see a bright white circle surrounding your eye pupil, making it easier to centre the primary and secondary mirrors.
Fits firmly into your focuser's 1.25" eyepiece holder and features a reflective inner surface.
Collimating cap fits fine, would definitely choose the £6 version looking back as the Collimaton cap isn’t very reflective making it a little harder to collimate. Over all though it isn’t bad.