DWB111 Propeller Nebula from Stinger 450 mm f/12.6 Classical Cassegrain, FLI Proline9000 and Baader Planetarium 50 x 50 mm Square Halpha Filter

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Taken on July 25 and August 2, 2008 from my backyard in Castro Valley, California

  "Scope City"

Stinger 450 Classical Cassegrain (18" f/12.6)  

Lumicon Giant Easy Guider without Focal reducer for final: F= 5760mm, f/12.6

Finger Lakes Proline PL9000 imaging camera operated at -35C


Finger Lakes CFW4-5 Filter wheel

SBIG ST7E guide camera

Baader Planetarium 7nm  FWHM Ha filter (50 x 50 mm squarer)

Custom Scientific 4.5nm FWHM [OIII] filter (50mm diameter)

13 exposures of 20 minutes through Halpha filter

Four hours 20 minutes total exposure time

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