[SII] = Red, Halpha = Green, [OIII] = Blue
Click image for medium resolution, here for highest resolution
(Sh2-157 is the bright yellow nebulosity just left of center in the upper third of image)
Taken on September 23- 25, 2004 from my backyard in Castro Valley, California
Takahashi FSQ106 f/5 (F=530mm) imaging scope
SBIG ST10XME imaging camera at -26C
AP80/900MM guide scope
SBIG ST7E guide camera at -20C
Finger Lakes CFW1 filter wheel
AP900GTO mount
Finger Lakes DF2 Focuser
Custom Scientific 50mm Narrowband Emission Line filters (AR Coated)
Sulfur II 673.4nm 3nm FWHM
Hydrogen alpha 656.3nm 3nm FWHM
Oxygen III 500.7nm 3nm FWHM
9 exposures of 30 minutes through Halpha filter
10 exposures of 30 minutes through [OIII] filter
10 exposures of 30 minutes through [SII] filter
14.5 hours total exposure time