Trifid and Lagoon Nebulae
I've been trying to get a shot of the Trifid nebula, but have struggled to get the target in my scope when a camera's attached. So... I settled for using my camera and telephoto lens on my motorized telescope mount. Larger is better.
10 shots at 30s, f/5.6, 1600 ISO, 300mm, and... flash did not fire.