NGC4490 & NGC4485 Unfiltered from Stinger 450 Classical Cassegrain and FLI CM10 Maxcam

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Taken on  April 15, 2007 from my backyard in Castro Valley, California

Stinger 450 Classical Cassegrain (18" f/12.6)    

Lumicon Giant Easy Guider with Focal reducer for final: F= 3366mm, f/7.1

Finger Lakes CM10 MaxCam imaging camera operated at -25C

Robofocus

Finger Lakes CFW1 Filter wheel

SBIG ST7E guide camera

Ten exposures of 10 minutes binned 2x2: no filter used

One hour and 40 minutes total exposure time

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