Mav359 Posted January 24, 2012 Share Posted January 24, 2012 Hi guys Sorry full of questions tonightDoes 120x1min exposures totalling 2 hours give the same quality of data as 12x10min exposures totalling 2 hours ? Link to comment Share on other sites More sharing options...
Afro Boy Posted January 26, 2012 Share Posted January 26, 2012 I'm no scientist/mathematician but I would say that it doesn't give you same amount of data.Longer exposures will give time for photons from fainter stars/features to build up and register on the imaging chip. The idea of using multiple subs/exposures and stacking them is to remove random artefacts like noise from your images.Having said all this, someone correct me if I'm wrong! Link to comment Share on other sites More sharing options...
Shibby Posted January 26, 2012 Share Posted January 26, 2012 There's no straight forward answer to this one, it's been discussed many times!http://stargazerslounge.com/imaging-discussion/77387-long-exp-vs-loads-stacked-subs.htmlhttp://stargazerslounge.com/imaging-discussion/69770-lots-short-high-iso-subs-few-longer-ones.htmlhttp://stargazerslounge.com/imaging-tips-tricks-techniques/141005-long-exposures-lots-short-exposures.html Link to comment Share on other sites More sharing options...
Mav359 Posted January 26, 2012 Author Share Posted January 26, 2012 Cheers Lewis i'll Have A Read Link to comment Share on other sites More sharing options...
LukeSkywatcher Posted January 26, 2012 Share Posted January 26, 2012 It really depends on the level of LP in your observing location. If it is terrible then lots of short exposures and then stacked is preferrable. If you are at a dark sky location then you can get away with longer exposures and less of them.Its all relative. Link to comment Share on other sites More sharing options...
themos Posted January 26, 2012 Share Posted January 26, 2012 if we had a perfect camera, it would be the same outcome.unfortunately, every time we read a real camera sensor, we get a few random pseudo-photons added to the mix. It's fair to say that beyond a certain minimum exposure time (which depends on your particular camera and sky conditions), doing it either way matters less and less. Link to comment Share on other sites More sharing options...
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