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I’ve been successfully imaging both DSO and Planetary for just over 3 years with a Canon 600D DSLR using my 6” f6 newt ( $299 AUD ) and my 8” f5 newt ( $540 AUD ) both under Bortle 8 heavy light polluted Sydney skies and Bortle 3 dark skies and have just recently progressed to a cooled OSC camera ( ZWOASI2600MC )
Depending on what FOV and detail you wish to achieve , a budget cost newtonian reflector with 6” and 8” aperture will give you satisfactory image results under varying Sky conditions at a low cost outlay
A basic newtonian reflector will definitely provide the biggest “bang for your buck” out of all the scopes and probably the most versatile all round type of scope as well
It’s not necessarily the scope that’s prime importance for imaging but the mount and camera would be top of the list for importance in DSO Astrophotography
Newtonian reflectors are simple in design and construction and require minimal maintenance if cared for. I check collimation before each imaging session which rarely changes unless I bump the scope. My mirrors are cleaned every 6 months depending on conditions.I use a Baader coma corrector to ensure my star field is free of coma across the field , it works extremely well on both scopes.
I have no experience with imaging refractors other than using them for my finder-scope and guide scope on the newt
Check out some of my images in the beginners Astrophotography section
I hope others will provide you some information on other types of scopes to give you and informative decision
Good luck
( From a newtonian astrophotographer )
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