Another relatively clear night. Took some Swan data with the modded 100ED.
640mm at f/6.4
Canon 5DH, 4x16min (all at 500 ISO) with Astronomic HA filter, 2x16 min O3 filter,
Recombined data thus
HA to RED
O3 green and blue to GREEN
Blue from LPR image to BLUE as cloud came in before I could get some Hbeta.
Large image 1.5MB
http://members.optusnet.com.au/~trlee8/SWAN.jpg
Seems to work. Tracking is working quite well since I drift aligned again.
Below is also an O3 image to show what you would typically see visually as your eyes sensitivity is a maximum at this wavelength.
Bert