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M13 Globular cluster in Hercules
FLI IMG1024S "Dream Machine" Camera @ -35deg C
Optec IR-blocking filters:
Luminance
Red
Green
Blue
Celestron C14 Telescope @ 3910mm focal length, f/11
Optec TCF-S Temperature Compensated focuser
Takahashi FSQ106 guide scope
SBIG ST7E guide camera
Taken at Chew's Ridge location in Monterey County, Ca. on April 11, 2002
LLRGB technique
Exposures:
L = 3 x 600 sec, Luminance filter
R = 1 x 600 sec, Red filter, 2x2 binned
G = 1 x 600 sec, Green filter, 2x2 binned
B = 1 x 600 sec, Blue filter, 2x2 binned