Nikon D5, Nikkor 300mm 2.8GII, Nikkor TC14EIII teleconverter at 420mm and f/6.7.
NGC6633 is an open cluster in the constellation Ophiuchus.
IC 4756 is an open cluster in Serpens constellation. 9x30s exposures at f/5.6, IS=6400 with Nikon D5 DSLR, Nikkor 300mm 2.8GVR2 lens, IDAS LPS D1 QRO filter, Avalon Linear mount, MGEN3 guider.
