M1 Crab Nebula unfiltered from Stinger 450 mm f/12.6 Classical Cassegrain used at f/7.4 and FLI Microline ML4022 with no filter

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Taken on September 17 and 18, 2010 from my ranch in the California Sierra Gold Country

Stinger 450 Classical Cassegrain 450mm f/12.6 used at f/7.3 (3366mm)

Astro-Physics AP1200GTO mount

Lumicon Giant Easy Guider with Focal reducer for final: F= 3366mm, f/7.4

Finger Lakes Microline ML4022  imaging camera operated at -25C

Robofocus

Finger Lakes CFW7 Filter wheel

SBIG ST7E guide camera

17 exposures of 5 minutes with no filter 

1 hour 25 minutes total exposure time 

With Emission line data from 2003 (see eline data source image)

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With RGB data from 2006 (see RGB data source image)

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