Quote:
Originally Posted by Satchmo
It needs to be pointed out that it depends what you are trying to image . If you are doing planetary imaging then there is benefit from a greater degree of oversampling or density of pixels as you are going to pick up better random moments of excellent seeing in very short exposures and weed them out for stacking. You would have far less chance of capturing the finest moments when you are doing 5 min plus subs.
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Yes indeed, the so called "Lucky Imaging" approach gives you a set of high speed video type frames where optimal seeing ones can be stacked and bad ones discarded. Ideal for planetary imaging. Traditional long subs effectively 'dumb down' incorporating all the bad seeing periods as well. A problem with 'Lucky Imaging' is the massive processing and storage load it can produce. Adaptive Optics may help in long sub capture but it does not seem to get much market penetration, perhaps due to complexities and cost.