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Thanks for all the kind comments.
Over the last few years I have been tweaking my system to improve my data collection.
The mount is guided by a 1250mm FL Mak even when doing wide fields. Since I built the observatory my polar alignment is and stays about as good as drift aligning can get it.
The signal to noise is very good due to two factors the fridge cooling the camera and dithering between exposures. A futher refinement is using an aperture in front of the Canon 300MM F2.8L lens. An extension on the lens light shield also helps especially for the faint stuff. This even improves narrow band data.
Combining full colour and narrow band data was the trick to getting a 'natural' looking image of a very faint extended object such as the Vela SNR. I used a method that is quite unorthodox.
All the other images I have done were just practice and training for this one.
I will go on practising and one day may get it closer to perfect.
The one thing that really helped was enough nights of clear skies while Vela was at or near the zenith. In the past I have had mosaic interruptus more often than I would like.
Bert
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