Deep Sky Photography with digital cameras

CCD Astrophotography by Jürgen Stein

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M51 (Whirlpool Galaxy) - Inverted

M51 (Whirlpool Galaxy) - Inverted

The inverted Luminance image shows weak streams of matter in the outer region of both galaxies. Additionally, many background galaxies can be seen the faintest of which have about 23mag. Luminance based on co-addition of all subframes regardless of the filter used.