Whirlpool Galaxy

Subject: M51 - Whirlpool Galaxy and NGC5195
Telescope: Celestron CPC 800 with f/6.3 reducer
Camera: Canon Rebel T1i
Technique: 50 approximately 30 second lights at 800 ISO. Total exposure time of 26 minutes 40 seconds. 8 darks. 50 biases.
Prime focus. Stacked with Deep Sky Stacker. Post-processing in Photoshop.

This is my third attempt at the Whirlpool Galaxy. For my previous attempt, the polar alignment and focus were so far off that I had to manually stack them. My first attempt was taken at a very high ISO resulting in too much noise and a loss of color. This new attempt is evidence to my progress.

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