NGC3756 in unfiltered light from Stinger 450 Classical Cassegrain and FLI Proline 3200

click image to enlarge, click here for highest resolution

Taken on March 21, 2008 from my backyard in Castro Valley, Ca.

 

Stinger 450 Classical Cassegrain (18" f/12.6)  

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

(binned 2x2, image scale = 0.84 arc-sec/pixel at capture)

Finger Lakes PL3200ME imaging camera operated at -45C

Robofocus

Finger Lakes CFW1 Filter wheel

SBIG ST7E guide camera

36 exposures of 5 minutes with no filter

three hours total exposure time

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