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Amateur Telescope Makers of Boston

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Submitted by Al Takeda on 06/05/2011 17:59:41

M51 - Before and After SN 2011dh

These images show M51 last month and after the supernova exploded. The May 1st image has a lot of flaws but with the importance of the event I decided to post it anyway. Both images were taken at the ATMoB Clubhouse in Westford, MA.

1 May 2011
11 images x 240 seconds subframe, Total= 44 minutes, TMB 92, f/5.5 plus field flattener, Unmodified Canon 20D DSLR, ISO 800.

3 June 2011
16 images x 240-seconds subframe, Total= 1 hr. 4 minutes. TMB 92, f/5.5 plus field flattener, Unmodified Canon 20D DSLR, ISO 800, Processing by Images Plus 2.80 and Photoshop.

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