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Old 20-06-2019, 05:59 PM
MarcSchafer (Marc)
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MarcSchafer is offline
Join Date: Jun 2019
Location: South Africa
Posts: 3
collimation of Ritchey Chretien telescope

I struggle to collimate my 8" RC accurately enough for my astrophotography. I cannot seem to find consistent focus across my image (see attached image of the Lagoon nebula) and wondered whether anyone out there can give me some advice. My RC scope only has collimation adjustment screws for the secondary mirror and the focuser column. There is no facility to collimate the primary mirror. I would have thought that this would simplify the collimation process - but not much success yet. Thank you in anticipation.
Attached Files
File Type: doc Lagoon Neb 2000 60x120s RC.doc (112.5 KB, 46 views)
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