"You're not afraid of the dark, are you?" - Riddick "The best scientists are humble. They seek to understand, not to ensure their legacy, but merely to understand." - Mori
You know you are there when you start thinking in terms of EXIT PUPIL rather than Magnification..
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
Quote: Would I be able to pick out minute detail and crisp structures on Jupiter with the 14 when well collimated?
Ray Teeter 18" f/3.5 Dob D&G 5.375" f/20(?) refractor 天体観測にも威力を発揮する、本格仕様の大口径双眼望遠鏡です。 興和ハイランダー
Quote:Thank you folks. I've also been debating for about half the price, an Orion XX14i truss dob. Visually how would it compare with the 12.5 Obsession? Some of my favorite objects to observe are the planets. Would I be able to pick out minute detail and crisp structures on Jupiter with the 14 when well collimated?
Happy owner of-- A Mag 1, 12.5 inch Porta Ball A Dual Axis Equatorial Platform A PST Double Stack
Quote: I would go with the Obsession.
"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
Main Scopes :- Obsession 12.5 with AN, used with TV 12, 16 & 20mm NT2's. TV (Renaissance ) 101 on Gibralter mount with Skytour used with SM90 / BF10. Denk Standard with dual arm power switch, pairs of 40mm's, 32mm Plossls, Tak 32mm Orthos, 35 & 30mm Ultimas, 28mm RKE's, 25mm VT mm Orthos, , 18mm & 12.5mm BGO's. Borg 77 usually with Herschel Wedge and Nagler 7mm.
Quote: Going to a 12.5-inch from an 8-inch will result in a massive difference in what you can see.
Tom Karpf (tkarpf) Vice President, Astronomical Society of Greater Hartford www.asgh.org
- Selsi 60mm f/13 Lunt 35mm Solar Scope Stellarvue SVR70ED
- Astronomy Technologies AT6RC Home-built Dobsonian with home-made mirror -
- 8" f/6.8 Unistar Deluxe on a surveyor's tripod
Orion XX14g, Orion XT8, 80mm Go Scope, 4.5 Starblast EQ
35mm Panoptic, 24mm ES, 14 & 10mm Pentax XW, 2.5mm Nagler Lumicon OIII Telrad Orion 25mm Kellner, 7mm Celestron Ortho
Orion Mini-Giant Bino 9x63
Couch-Potato Telescope (Bino Chair made by Sim Picheloup)
"For now we see in a mirror dimly..."
Quote:The price on the 12.5" Portaball last year was $5,195....
Quote: The problem with the 12.5" Starstructure is it's no longer made. I checked it out while on my newt quest. David
Quote: I saw that ad and called and called Starstructure. I was told that they didn't make it any more. David
Quote:Quote: The problem with the 12.5" Starstructure is it's no longer made. I checked it out while on my newt quest. David http://www.starstructure.com/starstructure3_007.htm
Nine telescopes of a diverse nature. My Web Site Cosmic Cat: a children's book about astronomy for iPad. English Lessons for Amateur Astronomers
George N Obsession 20 Optical Guidance Systems 10" F/9 R-C Cass 6" F/5 & 8" F/8 home-made Newts Explore Scientific 127mm ED MI-250 mount Denk II bino-viewer, with PowerX and Newt reducer, Member, International Dark-Sky Association
Quote:I have a 12.5 f/4 custom mirrored truss Dob. When it becomes time to upgrade to a larger Dob, I assume there is no point unless it is at least 15-16 inches. I don't want a larger one beyond that because I want to remain standing on ground. Prices for used truss dobs here on CN and on AM appear to be slightly over double for a 15-16 inch f/4 to 4.5 versus what I paid for the 12.5". All other components being equal is this a good standard rule for relative Dob value ($ Dob 12.5" x2+ = $ 15-16" Dob)?
Quote: Even a 16" is only marginally better than a 12.5" at reaching faint targets. If you change, you want the extra weight and size to have been worth it, and moving up so little just won't slap you in the face with the difference to the point where you will think the big increase in weight was worth it.
Quote: ...because I want to remain standing on ground
Quote:Does a 12.5 inch dob require dark skies to reap the benefits of an upgrade?
Quote: I often say my night skies are orange, what color are yours?
-DannyMy warehouseMy Channel
Quote:If you're buying that NEW, you definitely want to look at the Starstructure 12.5" with a Carl Zambuto mirror. Currently $3495. WELL worth the additional $200 above the price of the Obsession.http://www.starstructure.com/starstructure3_007.htm