Posted 22 May 2019 - 07:06 PM
Posted 22 May 2019 - 07:44 PM
This is a complicated journey and it can be daunting. I urge you to get one (or several) of the excellent books specifically written on this subject.
I hope others can offer title suggestions, but mine is “Getting Started: Budget Astrophotography”.
Good luck and enjoy the challenge !
Posted 22 May 2019 - 09:35 PM
For a host of very good reasons, conventional wisdom for starting AP:
- small refractor (65mm, 72mm, or 80mm aperture with f/ratio 7 or faster)
- good quality equatorial mount, minimally Orion Sirius (or the SW HEQ-5 equivalent)
- guidescope and monochrome guide camera
- PHD2 guiding software
- camera/mount control and image capture software (several options)
The Bracken book is popular, and will explain further the details behind the conventional wisdom.
Why not use the stuff you already own? Because the focal length of your C8 is long by beginning AP standards, and the focal ratio is slow at f/10. This gives the double whammy of both requiring very accurate tracking plus requiring long exposures. SCT’s are notoriously difficult to guide due to mirror movements.
Posted 22 May 2019 - 10:06 PM
In your position right now, using the equipment you have, the moon would be a good place to start. Take a few shots and stack them. Try video captures. If the pictures turn out good, then maybe Jupiter would be the next stop. Meanwhile, some great book references have been given.
Posted 23 May 2019 - 06:48 PM
Might I add, if using the C8, a focal reducer added to the imaging train would be a great place to start. Your focal ratio would be F6.3 and it reduces your focal length.... to approx. 1260mm,
much more forgiving for guiding. The image scale will be smaller but it will be more forgiving while guiding. Yes, you will need a different mount and autoguider.