ok thinking of going out one night and taking a shot of the town from along the beach - most of the shot will be dark sky etc - we are talking no ambient light apart from stars and maybe the moon.  So exposures above 5 secs are expected... apart from the obvious - need a tripod, use long exposure noise reduction, use mirror lockup, use a remote switch, i have one question:

High ISO or Long exposure: which is going to be better at producing a low noise shot? bearing in mind that each is a factor in noise production.  I am mainly concerned with the noise here - but if there are other factors like colour saturation or something that you know about please share... :biggrin:

thanks for any help.

"In every colour, there's the light.
In every stone sleeps a crystal.
Remember the Shaman, when he used to say:
Man is the dream of the Dolphin"

Rich Meadows Photography