Hi Brian,
It's great to hear you would like to get into astrophotography, and I am assuming not planetary imaging, but DSOs.
Your telescope has 2800mm focal length - so camera will need to have large pixels, and that usually means expensive cameras. Also, at that focal length you will need a VERY good mount.
To make things easier, you could reduce significantly focal length of your telescope with a good 0.5-0.6 reducer. Additionally binning pixels 2x2 could help.
With your telescope I would probably stay away from guide scopes and get an OAG instead.
When selecting the right camera for DSO imaging, aim first for about 2 arcseconds per pixel, in particular when getting started with astrophotography, and then look at cameras that will allow for such resolution.
I hope it helps a bit.
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