M16 in [SII], Halpha and [OIII] from Stinger 450 Classical Cassegrain and FLI IMG1024S Dream Machine with Custom Scientific 4.5nm emission line filters

DETAIL CROP from image below

Click to enlarge, click here for highest resolution

Click image to enlarge, click here for highest resolution

Taken on August 27 - 31 and Sept 1, 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 IMG1024S Dream Machine imaging camera operated at -30C

Robofocus

Finger Lakes CFW1 Filter wheel

SBIG ST7E guide camera

Custom Scientific 4.5nm FWHM Ha filter (50mm diameter)

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

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

eight exposures of 20 minutes through Halpha filter

thirteen exposures of 20 minutes through [OIII] filter

thirteen exposures of 20 minutes through [SII] filter

eleven hours 20 minutes total exposure time