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

click image to enlarge, click here for highest resolution

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

Robofocus

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

Hit Counter