M16_M17_300mm_f4_45x15s_ISO6400M17_2500px Published 28/05/2017 at 2500 × 2500 in First signs of summer: Milky Way ← Previous Next → Crop of the M16 and M17 picture, showing M17, the Swan nebula. 40x15s, Nikon 300mm PF, ISO 6400. Nikon D750 on Vixen Polarie