That is really a superb M104 Ray. Its definitely worth the effort to add to it. Its way better than a normal image of M104. I agree you do need good seeing for luminance in galaxies. Lovely round stars. 2 and 1 minute subs - wow. Short subs because of tracking or for other reasons? The usual logic is its better to go longer but those stars look great and probably would deteriorate with longer subs.
Greg.
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