<2 hour drive to gray/black zone “Contrast is not everything. Outside of aperture, contrast is the only thing” -Carl Zambuto
David W. Knisely . . . . . . "If you aren't having fun in this hobby, you aren't doing it right." Hyde Memorial Observatory http://www.hydeobservatory.info Prairie Astronomy Club http://www.prairieastronomyclub.org
Orion XT12i with Swayze-refigured primary & Protostar secondary
Televue NP101 refractor
William Optics Megrez 90 refractor
Universal Astronomics Deluxe Mounts
Quote:Just curious to find out what some of the different dobs weigh per inch of aperture. Here is what I have...17.5" StarStructure TL = 96 lbs. so96 lbs/17.5" aperture = 5.5 lbs/inch of apertureOrion XX12...86.5 lbs./12" aperture = 7.2 lbs./inch of aperture.Orion 6"35 lbs./6 aperture = 5.8 lbs./inch of aperture.I would love to hear from everyone from the Coulter owners to the ultralights.Jeff P
Homemade 14.5" f4.3 Truss Dobsonian
"I'd like to remind you at four in the morning my world is very still, The air is fresh under diamond skies, makes me glad to be alive." Randy Bachmann "Blue Collar"
“A mind is like a parachute. It doesn't work if it is not open.” ― Frank Zappa
12" Dob, 4" Mak, 3" APO, PST, bunch of green eyepieces & an understanding wife.
Scopes: 10" dob Antares Optics 1/30 wave secondary/Moonlite CR2, 13.1" home made truss dob Discovery optics, 4" achro (the banger)
Meade 16" f/4.5 Lightbridge M42 w/Paracorr & "Crossbow" EQT-200 Equatorial Platform
Meade AR-6 w/10:1 Dual Speed Crayford Focuser
Meade ETX-125 Terabeam/Wegat
Orion ST80 w/single speed Crayford Focuser
CGEM Hypertuned by Deep Space Products
Celestron 8SE Dobstuff 13.1": Swayze refigured Coulter mirror, 6 pt mirror cell (2 pt edge support) and CF focuser board made by me StarBlast 4.5 ST80/PortaMount II Zhumell 20x80/Oberwerk 15x70 on a Seronik-style tripod boom mount Hubble Optics 18 inch F/4 mirror.
1st Caveman Award!Maynard Clark 8" f/8The Horsetrail Cave 12.5" f/7.51975 Cave 8" f/7 Lightweight Deluxe1972 Cave 8" f/4.5 RFT DeluxeCriterion RV-6Logitech HD C615 Webcam for Imaging
Jeff Huston Obsession 30" f/5 (#102) Obsession 18" f/4.5 (#264) Celestron C9.25 f/10 Losmandy GM8 Cave 8" f/6 Newt Orion 80 and 120mm f/5 achro Coronado PST Vixen Polaris
Quote:The HST is weightless so it wins
Quote: Way to much.... Wood adds up quicker than I expoected.
"I have been paddling in the shallows of a great ocean of knowledge." - Sir Isaac Newton * * 15" F4.55 Starsplitter Dob & a Denk II binoviewer * * http://peaceofsky.wordpress.com/ Pacheco State Park Fremont Peak
Happy owner of-- A Mag 1, 12.5 inch Porta Ball A Dual Axis Equatorial Platform A PST Double Stack
I think it is clearing up!
Retired owner of Tectron Telescopes and retired editor of "Amateur Astronomy Magazine." Author of "The Modern Dobsonian" and "Starry Starry Nights"
Quote:... another measure might be pounds/square inch, the weight for a given amount of light gathering.
Few astronomical observations have really changed our perspective on earth's place in the universe. Those that did were made around 1610 with a 20x power, 0.3° field of view telescope, sporting a singlet objective stopped down to 15 mm.
I mostly use small, fast, and (ultra)portable glass: Bushnell Legend 8x42, Pentax PCF WP II 20x60, MiniBorg 60ED, ST-80, EON-80, ST-120, 6" StarBlast.
Quote:My new 20inch OTA is 69lbs, very happy with it. 3.5lbs
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