Globular cluster M 13 – September 29, 2014
In a previous post I was presenting some LRGB tests with the small TS 65Q APO refractor on the Hercules globular cluster.
Now I’m presenting something a bit better: a LRGB result done with the the TS 115mm APO on basically the same conditions. This time I’ve stacked 188 frames, each a 16 second subframe for the L channel, and 3×30 frames for the RGB channels, each a 15 second exposure. The camera was again the ASI120MM with Baader RGB CCD filters and the UV/IR cut filter.
And the black-and-white version:
On darker skies, let’s say on mag. +7 skies, and with double or more frames, the result should be far better.
(October 3, 2014)