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mauriceramirez wrote:
Andrey and David, appreciate it! David, that's a good idea, wish I'd known D800 was already so dirty at iso 1600 and to have done that.
I haven't done much landscape, even less dark sky stuff so figured 20 secs would introduce noticeable star trails.
Hey Maurice,
A cool looking shot, especially as it sounds like you haven't done much in the way of star shots before. I will second what David said about shooting at a longer shutter speed.
But I have to correct a statement you made here, the D800 does not shoot dirty (noisy) shots at ISO 1600. I have shot clean star shots all the way to ISO 12,800... it's all about a proper exposure. I normally shoot my star shots from ISO 3200 to 5000 without any noise. If you are getting noise at ISO 1600 then it only means one thing, and that is that you severely underexposed your shot. Which if you shot at only a shutter speed of 8 secs and ISO 1600... man.... you are going to be about 4 stops or more underexposed... So of course you are going to see noise or in your words a "dirty" image.
When shooting at night, you have to becareful to not trust what you are seeing on your LCD screen. because it's so dark out, the LCD even when a shot is very underexposed will make a shot look perfect on that little 3" LCD screen. You have to look at the histogram.... it's your friend.
Jim
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