A 90 mak will only let you see brightest dso's, an 8" dob mounted reflector will let you see much more, however if you live in a city apartment a 8" may be Impractical ..I have a 4" refractor (which is a good city choice IMO on an altaz mount), I have had 12" & 8" reflector on dob mount & they just not suit me
Have you had ny viewing exp?
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