Mmm I think I would waste half the night sometimes and still did not get pa acceptable☺ although taking star circle trails worked rather well it but most of the time it could be time comnsuming.
The only disadvantage for many short exposures I have found so far is the time it takes to stack..I am working up an Eta Carina image that used mainly 30 sec subs and a few 60 sec subs about 3 hours plus...after stacking them all and running them thru star tools I found due to an alignment error I had to start again...all night the night before last night..all last night and now it says only one hour to go☺ .... so in an hour into star tools to process eight groups and then to photoshop to put them together...
Alex
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