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no argument that longer is better (see original post).
I was trying to point out that there is no clear correspondence in imaging time between systems. For example, I imagine that Bert's system will quite comfortably produce an image of the outer parts of Helix in 30 minutes - mine takes a few hours and a DSLR based system could take days - there is no correspondence in imaging time between these systems.
You may decide on exposure times for a given system and for your expectations of quality, but there is no point in someone else with a different system trying to use that as a guide. Even within a given system, you can change the required imaging time by huge amounts - eg, if you decide to 2x2 bin your data, you can reduce your imaging time to 1/4 that required at maximum resolution.
Last edited by Shiraz; 23-10-2013 at 01:36 PM.
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