More stuff than I need; Not as much as I want
(Main scope: CPC800/Mallincam Color Hyper Plus)
Mason & Hamlin BB 2140 mm (grand piano)
Westchester Amateur Astronomers
CPC 1100, Celestar 8, Televue Pronto, ZEQ25gt Mount, Sky Safari/iPad
John L ========= Celestron 80ed Celestron C8 AT90edt Celestron AVX celestron CG5 Canon 600D modded William Optics Binoviewer Orion 10x50 bino's Ep's The collection is building ¡ʇɔs ɐ uʍo noʎ ǝƃɐssǝɯ sıɥʇ pɐǝɹ uɐɔ noʎ ɟı
CPC1100 w/ Denk S2 power switch (IVB).
Denk Binotron-27, 2x D21 eyepieces
TV 55mm Plossl AT 38mm Titan 8, 13, 17, 22mm AT AF70 eyepieces
iPad w/Skywire/Skysafari+ StarSense
NexStar 5SE w/associated goodies
80mm refractor & manual GEM
Quote:I was wondering if C8(and other 8" SCT's) is really a good telescope for visual deepsky observation?
According to telescope optical equations, Minimum magnification of C8 is200/7 = 29
And Eyepiece needed to get that brightness is 7*10 = 70mm.
Ok I can understand from the above it isnt possible to operate at 100% surface brightness.
Then if I operate at optimal surface brightness, then optimal magnitude will be 200/2 = 100. Which might not be such good magnification for deep sky given 8% surface brightness.
So most 8" SCTs come with f/10. So are they really good for visual deep sky?
Uncle Rod Uncle Rod's Astroblog: http://uncle-rods.blogspot.com/
Celestron cpc 1100 Celestron 127 Mak on CG5 WO Binoviewers Baader Aspherics 36, 31 mm. Baader Hyperions 24, 21, 13, 10, 8, 5 mm & 8 - 24 zoom. Numerous Filters - 0III, UHC, UHS-S and Coloured.
Celebrating the 30th anniversary of the USFL, when football was more than a game.
That's me in the avatar running back a pass I intercepted for a touchdown
Skywatcher 120ED Refractor Assorted Zhumell Planetary, Skywatcher and ES eyepieces, a 2x barlow and a few filters. iOptron MiniTower II Sony NEX 3 for astrophotography