AP 178 f/9 10" Royce Optics Dall Kirkham Conservator of Tom Back's personal TMB 100/800 (Strehl .997!) PST
Nine telescopes of a diverse nature. My Web Site Cosmic Cat: a children's book about astronomy for iPad. English Lessons for Amateur Astronomers
Quote:The G11 will be overwhelmed by the 178. The 6" f/12 won't be much better. Also be prepared for the eyepiece to be too low for comfortable use when aimed high, even if you have a 5' tripod.
Quote:The G11 tripod is not the issue. It's strong enough. The native height of the tripod is 48". Add the extension and you have 5' tripod. This is a good height for my 6" f/9, but is pretty short for anything substantially longer.I have a different experience with the G11 head. It's good for visual use with my scope, but if it's even somewhat windy it's frustrating at high powers. I've also used a 6" f/12 on a pier-mounted G11 under a dome. It was quite wobbly and unacceptable to me. A 178 would weigh close to twice as much and be unacceptable to me on a G11. Of course different people have different tolerances for that sort of thing. In my opinion a 900-class mount is optimal for these scopes, and mandatory for imaging.
Quote:I used a 175/8 on a G11 and it could best be described as "squirrely" and "spaghettified"
Quote:I am leaning towards finding an old AP900 QMD. The cost is reasonable and I like the fact that it's still pretty portable.
"Coffee leads men to trifle away their time, scald their chops, and spend their money, all for a little base, black, thick, nasty, bitter, stinking nauseous puddle water." ~The Women's Petition Against Coffee, 1674If it ain't broke, fix it 'til it is.
Quote:Yes Mike! I was told it was your scope and I was very happy to hear that. I saw your pictures online before I found out it that this particular scope was yours. It is in terrific condition and I am very psyched to use it. As for the mount question, I was thinking I might be able to pick up an old AP 800 for the 178 if I found out the G11 was borderline. I am open to and interested in any recommendations.
David Cotterell Toronto, Ontario "If an observer actually sees an object, there is no point in referring to a formula to find out whether he ought to see it; and if he fails to detect it, no formula will ensure his success." - W.H. Steavenson 8" f/15.5 TEC Maksutov 16" f/5 Teeter/Zambuto Dob 66mm WO SD AT 65EDQ APO Refractor Astro-Physics Mach 1 GTO Mount iOptron ZEQ25 mount Canon 60Da
Quote:Before you spend a lot of dosh on a big mount why not try a Hargreaves Strut ?If the scope's weight is not a problem for your G11 but its length and moment arm are this may be a solution for you for under $100...At least you could slap one together until you find the right mount.....Dave
Quote:I cant wait to get the Superplanetary and the 178 set up. This particular 178s OTA has been cut down for binoviewing so it will be my "cruiser", just scanning the milky way etc. I figured that the 6" will be my go to planetary and lunar machine under the average lousy jet stream ridden skies we have here in New England. It should max out the view on most nights. When the seeing is better, I will bring out the DK 10". As a visual observer with many cloudy nights and light polluted skies, I decided that I need aperture, the fast cool down times and the ease of use of the refractor, so that I can see all I can with short notice and hectic work schedule. I can always fall back on my excellent tmb 100 for real grab and go. Plus, I couldn't pass up the opportunity to grab these legends as they became available. I will do what it takes to adjust my mounts to accommodate them and I appreciate all of this input.
Quote:Quote:Before you spend a lot of dosh on a big mount why not try a Hargreaves Strut ?If the scope's weight is not a problem for your G11 but its length and moment arm are this may be a solution for you for under $100...At least you could slap one together until you find the right mount.....Dave Whoa! That's a new one on me. Thanks Dave!
WO Megrez 120 ED on GP Mount
WO ZenithStar 80 ED II on Porta II
10" Meade LightBridge/Paracorr
Orion ED 100 on Polaris Mount
Astro-Tech 8" f6 Dob
Bushnell Ares 5
Meade 226 2.4" f11.7
SpaceScope 2.4" f15
Quote:On another note, do I need to shine a green laser through the objective to determine air or oil-spaced? If so, can someone tell me what to look for t tell the difference?
Quote: Before you spend a lot of dosh on a big mount why not try a Hargreaves Strut ?
Quote:the AP 900GTO is wonderful. I use the G11 pier with an AP/Losmandy adapter set.