Bryan Stone Past President, NSAAC (North Shore Amateur Astronomy Club) Visual Astronomer with: "GoldenEye" XT8 Classic, flocked, Moonlite CR2(Gold), Telrad, 1st Base mount Serial #001 "Night Hawk" SV 80mm f/7 Aplanat on M1/GNG TV 11NT6, 32P, 1.8xB, Pentax XF 8.5 ES 82 N2 6.7, GSO SV 30, UO KII 16 Lumicon OIII,Orion Ultrablock, Moon Filter, 4 color filters, 25mm Sirius P, 10x50 Explorer Binocs, Celestron broadband filter,Tectron collimation tools, Pelican 1500 Divider Case, StarDust chair
Quote: Under average seeing conditions, a useful rule of thumb in astronomy is that a good 3" to 4" refractor will usually outperform an average 6" to 8" reflector or Schmidt-Cassegrain for seeing details on the Moon and planets, splitting binary stars, and resolving globular clusters."
Quote: Quote: Under average seeing conditions, a useful rule of thumb in astronomy is that a good 3" to 4" refractor will usually outperform an average 6" to 8" reflector or Schmidt-Cassegrain for seeing details on the Moon and planets, splitting binary stars, and resolving globular clusters." Well, you can't always believe what your read. I have several 3 and 4 inch refractors including one of each that I consider excellent. They are no match for my pedestrian 8 inch F/5 Synta reflector on the planets, globulars etc.. If your average seeing conditions are so poor that a 4 inch outperforms an 8 inch, you have my sympathies and I am glad that rarely is the seeing that bad around here.Jon
François C8 f/10, lunt 102 mm f/7 ED. SkyWatcher 12" f/5. pentax XW 40, 30,10 delos 14, 8, 6, 4.5. Vixen lvw 22 Brandon 12, 8 TV 2x barlow Closer and closer to the ideal eyepiece collection, but never reaching perfection
My eyepieces are made from the waste product of exploding stars. 10XTi 102XLT ST80A(2" Focuser) XW: All; XO: 2.58 Televue: Naglers-T1 Smoothside-full set, 17T4,12T4,Ethos 17,4.7; plossels-40,32,20,17,&7.4mm; Pans-22,24mm; Delos-6,8,12,17.3mm ES100: 5.5,9*,14,20 ES82: full set ES68: 16,20,24,34 NLV: 5,9,10,15 Ortho: HD-7,9; OPS-9,12 Meade RG 7mm Other: Pentax 12.5K(.965), 10mm Parks Zoom: Nag3-6 *=on b/o DAS Dark Site
Quote:My only refractor I have ever owned was a 50mm toy. So this should be quite a learning and enjoyable experience. Also, what really made me want to get a refractor aside from refractors being awesome, was the book starlight nights. One of the best books I have ever read.
Quote:"And if you are not using a Paracorr and the good eyepieces in your Dob, you might be in for another treat."I'd bypass extras for the old scope and focus on the new toy, the refractor instead, like a pier to clear the tripod which will allow for more comfortable, direct, straight-through observing, if so inclined, in addition to extra two-inch oculars, if lacking.Refractors do not require coma-corrective devices.Cheers,Alan
Quote:The integrated dew shield will delay dew formation for only a short time. There used to be foam-lined dew shield extensions offered, I've forgotten the brand, but AstroZap currently offers a felt-lined shield which slips over the end of the scope's shield and would help extend observing time. I've been looking at the electric dew controllers, and they're the best, particularly if you observe for several hours, with heating straps for the objective, eyepiece, etc. I haven't decided which method to choose myself...probably the electric system.Cheers,Alan