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Photographic Magnitude
Folks,
Pleas bear with me, I'm only just starting to take my first tentative steps down the slippery slope of astro imaging.
When you look at the specs for a scope, you often see it's 'limiting magnitude' which I gather is its Visual limiting magnitude under perfect skies. Now, surely when the same scope is used for CCD astrophotography, the magnitude of the stars it can image would be significantly more. Is there any way of working this out? I realise that if you just take longer images, then fainter stars will be imaged, but where does the practical limit lie?
Cheers,
Jason.
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