Lynds Group 11 including Sharpless 2-157 (Sh2-157) in [SII], Halpha and [OIII] light

[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

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