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Influence of positioning errors of the laser collimator on the beam shape and coupling efficiency - ScienceDirect
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5. Building a Laser Collimator for Newtonian Telescope | Educational Astronomical Photography and Video
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Amazon.com : SVBONY SV121 Red Laser Collimator, Adjustable 1.25 inch Collimation Eyepiece, with 2 inches Adapter, Telescope Accessory for Newtonian Dobsonian Marca Telescope : Electronics
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