10" Newtonian on Atlas EQ-G
Posted 01 December 2012 - 06:11 PM
I'm not quite sure if this is where this post belongs...
I am looking at Orion's 10" f/3.9 Newtonian as my next telescope. It's 25 lbs, and the Atlas has a 40 lb weight limit, but I read somewhere that 20 lbs was the sweet spot for the mount, and since I plan to use the scope for photography, I'll be adding a guide scope and a DSLR, I'm not sure if I should be putting a 25 lb scope on the Atlas. The last thing I want to do is damage my mount. Am I safe getting the 10"? Should I downsize and just get the 8" f/3.9 Newtonian instead? I've seen images taken with the Atlas and the 10" Newtonian in Orion's catalog, but that's Orion's catalog, and I don't fully trust a source that wants to sell me something.
Also, any insight you can provide on the advantages and disadvantages of a short focal-length reflector would make my day.
If you want to see the exact scope I'm talking about, here.
Posted 01 December 2012 - 06:47 PM
Posted 01 December 2012 - 06:51 PM
Posted 01 December 2012 - 06:55 PM
Visual... big scope on an adequate mount.
Imaging... small to modest scope on a solid mount.
Posted 01 December 2012 - 06:58 PM
I think you'll be okay with the 10" but I really think you should consider the 8" f4, you'll be plenty happy with it and it will be a bit easier of a load. The 10" will be much bigger than you imagine once you open the box and put it up on the mount.
Posted 01 December 2012 - 10:55 PM
Posted 02 December 2012 - 09:21 AM
Posted 02 December 2012 - 11:33 AM
You may also want to consider the Baader MPCC for for visual and AP with an F/4 scope. Although you can crop out the coma at the edge of the field for most wide field stuff, for visual you will want the coma correction and also want it for AP on targets like M31, M42, M45 and the big open clusters and Milky Way stuff.
Posted 02 December 2012 - 02:09 PM
Posted 02 December 2012 - 06:51 PM
You will see a huge difference between the 6" and the 8" and imaging at f4 will be a shock. Even going from f5, you will notice the difference.
MPCC or Paracorr is a must.
Posted 02 December 2012 - 09:04 PM
Posted 02 December 2012 - 11:17 PM
With accessories, the scope weighed 44 lb., and the Atlas handled it like a champ, but my back was complaining.
The Atlas would have no difficulty handling a 10" Skywatcher Carbon Fibre Quattro (f/4), at about 21 lb., or your scope at 25 lb..
But, as others have said, 10" is an ambitious start for imaging, and most imagers recommend cutting the rated capacity in half for imaging purposes.
If mainly visual, go for the 10"; if mainly imaging, go for the 8".
(I have the the 8" Quattro, which I'm currently using on iOptron iEQ45 and on a Skywatcher AZ4 - it's great.)
Posted 03 December 2012 - 09:14 AM
Posted 03 December 2012 - 05:32 PM
Posted 03 December 2012 - 10:50 PM
Posted 04 December 2012 - 02:20 AM
Posted 04 December 2012 - 02:18 PM
He has a dome etc where wind may not cause a problem. As said above I found the 10" too wobbly for visual. Might work fine in a dome or in a kinder climate.