Thread: How do I collimate my 152mm (Achromat) refractor with the aid of a laser
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Old 27-03-2025, 10:14 AM
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Sunfish (Ray)
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Location: Wollongong
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Build one of these GMK collimators yourself if you have that lathe equipment and an old three or four led torch. If the result shows almost perfect , leave it alone.

http://www.fernrohr-service.de/4.htm...uIMlmAqtKt2EjM
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