14.5" Starmaster with ServoCat and Argo Navis 1966 Unitron 4" Model 152 EQ Tec 140 TV NP101 f/5.4 APO Telvue .8 Focal Reducer FLI ML8300 and CFW-2-7 filter wheel Astrodon Gen2 RGBL 2" filters Baader 2" Narrow Band Filters Borg 50mm Guide Scope/ATIK Titan Guide Camera AstroPhysics AP900 Losmandy GM-8 Gemini
-My kingdom for blue squares!-
mini Borg 50/ST-i/PHD
CGEM - Hypertuned by Deep Space Products
Canon 500D Hypercams Baader mod
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waassaabee @ Astrobin
Jason Lovettsville, VA US AT12RC 6" Questar Astro TMB 92mm LS
Quote:Write on ... It sounds like I may need a box of collimation tools though...
GSO 8" RC, Stellarvue Nighthawk 80mm/f7 ED, Stellarvue 10x60 finder, Pentax K100d DSLR (unmod), QHY8 OSC CCD, Losmandy G11-g2. Orion Autoguider, numerous other bits and pieces http://www.flickr.com/mylotian
Quote:Are any of the laser collimators accurate enough for alignments in this kind of system with fast optics and multiple mirrors? My experience with a MNT taught me that the laser was useless for anything but crude alignment. Autocollimation was the only method that got the job done, and the final tweaks required star testing.
Quote:As I understand it, RC systems require precise alignment of the optical axes of the primary and secondary and the spacing between the two has a tight tolerance as well. The scope needs a reference surface for this alignment geometry, and since the manufacturer specifically warns not to adjust the primary, I'd guess they use the primary cell as their reference surface.
Quote:I have yet to see a manufacturer that provides clear drawings of the optical system and describes a top-down approach to collimation. Trial and error works for Newts, but IMO it's a recipe for pain on any scope with more than two optical elements.