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01-JAN-2009
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Alan Smallbone |
Mean Rosette 11x900 Ha_b.jpg
Anza, CA
This is 11 exposures, each 15 minutes, with a Borg 125SD with 0.85x reducer for a focal length of 667mm at f5.6, using a Astronomik Ha 13nm filter.
SBIG STL-11000 with IDAS RS LRGB filters,Borg 125mm f5.6
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