Celestron 8" Edge Apogee 80mm ED refractor Hypertuned CGEM Bogen 3046/Unistar light Modded Canon 450D/ Canon EF200mm F/2.8 A whole bunch of other stuff
Leica 8x20; Nikon Action 7x35; Vixen Apex Pro 8x42; Orion 15x63; Docter Nobilem 15x60
WO Megrez II 80 FD / APM 107mm f/6.5 / Mewlon 210 on DM-6 + Berlebach Planet
Quote:no worrying about a dual setup not being orthogonal between scopes.
David Cotterell Toronto, Ontario "If an observer actually sees an object, there is no point in referring to a formula to find out whether he ought to see it; and if he fails to detect it, no formula will ensure his success." - W.H. Steavenson 8" f/15.5 TEC Maksutov 16" f/5 Teeter/Zambuto Dob 66mm WO SD AT 65EDQ APO Refractor Astro-Physics Mach 1 GTO Mount iOptron ZEQ25 mount Canon 60Da
Quote:In a dual mount (or a side-by-side) which only has rigidly mounted dovetails (and you do want them to be rigid...) you're asking an awful lot to expect that the two telescopes mounted thereon will point at precisely the same point in the sky to small arcminute tolerances.
Pretty much impossible, actually.
Thus the need for micro-adjustment of one of the scopes.