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Old 18-09-2019, 09:54 PM
foc (Ross)
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foc is offline
 
Join Date: Apr 2017
Location: ACT
Posts: 208
Hi again,

This thread talks a bit about focal ratio in imaging:

https://www.cloudynights.com/topic/6...-and-question/

or

https://www.cloudynights.com/topic/6...f-the-cobwebs/


While the quality of 1000 of your current frames is worth far more of those I normally capture, and even more impressive with the ZWO1220MC which is not as sensitive as the 1224MC, do know that current approach (which differs from past views on this subject which were often more like 90 seconds to 2 minutes) with a modern color planetary camera is 3 minutes on Jupiter and say 6 minutes on Saturn, more obviously on Neptune and the numbers are likely to be significantly larger than this with small scopes.

This is mentioned by numerous much better imagers than myself, in particular one of the top imagers Daryl (Kokatha man)who was recently featured on the ZWO site, has shown this even with a C14, I can not quickly find one of the threads where he sets out his experience but in brief you can see this view in for example the second post by another Aussie Imager in the thread below (and lots of other good info here down the thread) and so you may like to obtain well over 20,000 frames although in AS3 you will only stack the percentage that is above 50% in quality (or any higher limit you pick)

https://www.cloudynights.com/topic/6...p-appreciated/.

I am particularly keen to mention this because if you can regularly produce such great images with 1000 frames (better than I ever approached with that number), I would very much like to see what you can do with 10 times that number or more!

As you say you may have fluked the conditions, but you did the main thing which was to get out there!, as to the rest if you have good conditions planetary imaging and processing is much easier than practicing the dark arts on DSOs so you may expect to get a lot more even finer images yet.

For those using DSLRs who might be put off by these numbers while with a well set up Canon DSLR you do not collect frames nearly as fast but the quality of individual frames is often far better so you only need a small fraction of as many frames

Last edited by foc; 18-09-2019 at 10:21 PM.
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