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Dave,
I find it's a compromise with the sub lengths using my Newt (by the way haven't taking in out for quite a while lately). Yes, the longer exposure naturally the more enhanced the detail but I see your point with shorter subs being a bit more forgiving in regards to keeping things looking sharp. Perfect polar alignment is the key in trying to meet halfway I recon. I'm tipping with your C14's light capacity coupled with your OSC is doing a fine enough job anyhow (nice shot!).
Have a look at some posts in the past in this section where large numbers of subs at short exposure produce very good results (Kevin will vouch for this I'm sure).
Regards,
Anthony
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