Messier 101

A full resolution 2.36 Mb image is here . Click here for a crop of the central section of this image. Messier 101 was the subject for my first LRGB image with an older Starlight camera which can be seen here.

Imaged 2010 April 16th and 17th at the Kelling Heath Star Party, Norfolk, UK
Televue TVNP101 100mm APO refractor 540mm fl.
Starlight Lodestar autoguider on G11 Mount
SBig ST8300M CCD camera
Images acquired in Maxim DL Pro 5
 True Tech RGB colour filters
LRGB image L 85 mins 1x1, R 15 mins 2x2 G 15 mins 2x2, B 15 mins 2x2,  Two hours 10 minute total exposure.
Luminance sub exposures 300 seconds at -30 deg C.
RGB sub exposures 150 seconds at -30 deg C.


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