Dark site scope: Meade 8" f/6 Dob | Weeknight scopes: C9.25/iEQ45M, C102/LXD-75
(I am looking for a 1980s Edmund Scientific 3" f/10 red-tube reflector, PM me if you have or know of one!)
Roberto Botero Kent, UK
My CN sketch gallery.
Tele Vue 102 #1321 on Vixen GPDX eq mount 35 mm & 24 mm Panoptic, 17 mm Nagler T4, 11, 9, 7 mm Nagler T6 1.8x and 2x TV Barlows
Grab-and-go: Tele Vue 76 #2003 on Gibraltar alt/az mount Pentax SMC 8-24mm zoom Nagler 3-6mm zoom
Quote:One question has come to mind -- and I may have completely missed this in my research -- is there a general formula or rule of thumb for the requisite magnification needed to split a double in a particular scope? That is, if I have x scope, I would need at least y magnification before having a chance at discerning that there are two stars and not just one? If such a rule is out there, I am sure it involves the diameter of the scope's objective as that determines, all things being equal, the resolution. Mine is exceptionally modest: 66 mm.