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
Two eyes (5-7mm in full darkness) TS 15x70mm binos TeleVue Genesis 100mm f=500mm Polarex 80mm f=500mm spotting scope (1973) modded and enhanced 2012 GSO 400mm Dob f=1800mm Canon EOS 6 w/85mm f/1.8, 50mm macro f/2,5
Quote:Probably a collimation error of the Mak.I have a 250mm Dobson and a Televue Genesis and in some cases the Genesis issues crisper images of double stars than the Dobson despite the Dobson is two magnitudes brighter.
Quote:Seems the first line in the original post may have a contribution to the observed phenomenon...