NGC7331 RGB from Stinger 450 Classical Cassegrain used at f/7.3 and FLI ML4022 

RGB only

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Taken on July 30 and August 6 and 7, 2010 from my ranch in the California Gold Country

 

With 102 x 5 minutes unfiltered luminance

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Luminance taken September 18 and 19, 2009 from AP180EDT f/9 and Apogee U16

 

  

Stinger 450 Classical Cassegrain (18" f/12.6)  

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

Optec IR-Blocking 50mm round filters

34 exposures of 5 minutes Blue

12 exposures of 5 minutes Red

24 exposures of 5 minutes Green 

102 x 5 minutes unfiltered Luminance from AP180EDT f/9 and U16

5 hours 50 minutes total exposure time (RGB)

14 hours 20 minutes total exposure including luminance

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