QSI-683 CCD, 6x600s, at 660mm, and f/5.2 with Astrodon Lum filter, image digitally resized 2x
Wikipedia: https://en.wikipedia.org/wiki/Whirlpool_Galaxy Photo: 13x30s, ISO12800, f/5.6, Nikon D5 DSLR, Nikkor 300mm 2.8GVRII lens, Avalon Linear mount, IDAS LPS D1 QRO filter.
Photo: 7x170s, ISO3200, f/4, Nikon D5 DSLR, Nikkor 300mm 2.8GVRII lens, Avalon Linear mount, IDAS LPS D1 QRO filter.
