So I've had my scope for about two months, had to build a base for it before being able to use it. then got a few things like a 2x barlow . took me a little while to figure out my spacing with the Barlow and without for attaching my old camera. (Nikon D200). I live in an area with a lot of light pollution so seeing deep sky is almost out of the question unless there is crystal clear air (wind moving north) then I may be able to see m21 I live just below Baltimore, MD so not there is not only light pollution but also pollution from the factories. The only thing to see clearly is the moon do here's my first shot of anything since 1985. this is through the Orion 10' f3.9, GSO 2" 2x ED Barlow with 30mm screw in extension and zero profile adaptor to my Nikon D200.
If you can, purchase the Optolong L-eNhance filter, about $229. That will allow you to image in the light pollution you live in. I bought mine last week and used it successfully two nights ago with my Orion 120ST refractor. I live just outside Boston, MA and the sky is a Bortle 6/7 here, can only see the stars of the constellations and not much else. Here is a pic taken with the L-eNhance filter with my refractor: