Selecting exposure time(s) and Canon EOS data
I'm wondering if there is a reference for selecting exposure times and film speeds when doing DSLR DSO astrophotography.
How do you select the individual exposure lengths and number of exposures based on the surface brightness of the DSO and camera ISO setting?
I realise the noise benefits of keeping the ISO setting as low as possible to reduce noise, but that's about it.
Thanks,
Tom.
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