I have quite a lot of camera gear already and I would like to get into the field of AP. I have done some reading and the general consensus is the mount is probably most important. I cannot afford a good mount and a scope all at once so I am looking into using my camera gear with a good mount until such a time that I can get an 80mm triplet refractor to go with it. I have seen quite a few good images taken with Sigma or Tamron 150-600mm lenses and seeing as how I already own the camera gear I figured this would be the best entry into the field of AP until I can get a scope to go with the mount. The next step after the scope would be getting a dedicated AP CCD or CMOS camera with cooling.
For visual observing I have recently gotten a 12" dob so I have that covered for now. Imaging is really where I want to get to though. I guess I should mention that I want to be able to shoot DSO's. I would like to be able to shoot planetary, but there's only so many planets to shoot and I'd rather have the ability to search for and shoot dozens and dozens of things in the night sky. So at this time I would prefer to primarily set up for nebulas and galaxies and if I can manage some planetary with what I have or get then great.
Here is the gear I have:
Nikon D7200 crop sensor camera
Nikon D850 full frame camera
Tamron 150 - 600mm G2 f5 - 6.3
Tamron 24-70mm G2 f2.8
Tamron 70 - 200mm G2 f2.8
Tokina AT-X Pro DX 11-20mm f2.8 (For dx crop sensor camera only)
1 - First off, is the Atlas II EQ-G Equatorial Go To mount a good long term mount? With the idea of moving to a triplet 80mm possibly as large as a 127mm or so refractor?
2 - Can I attach my camera and 150-600mm lens to this mount and use it for tracking? I think tracking is the correct word, I have also seen mention of guiding.
3 - Assuming it will attach, how do I attach it? I assume it doesn't have a simple plate to accept the mounting bracket on the lens that I use when attaching it to my gimbal head for wildlife photography.
Thanks for your assistance.