Horsehead Neb. Fixed tripod, 5 sec. exposure
Ok, a stack of 125, 5 sec exposures. I was also testing the limits of the D7100 high ISO and used ISO 3200 for these. 45 mm, f2.8 (using a Nikon 17-55mm) 125 X 5 sec. ISO 3200
Even in my film days, on a tracking mount, I never managed even a whisper of the Horsehead.
Granted it's rough, but who would ever have thought you could just set your camera on a tripod and snag a crude image of the Horsehead 20-30 yrs ago !