Peter;
It all epends on the focal length that you're shooting with. If you
use, say, a 28mm, you could shoot for 30 sec or so without any visible
streaks. But if you're using a telephoto or a telescope, the max
shutter time becomes much less.
George
"Peter A. Klein" wrote:
>
> Catmaster says:
>
> >My feeble attempt to shoot the moon is at:
> >www.spottedcats.com/olympus
> >This is my Christmas present to you all.
> >A FULL MOON!!!!
>
> I haven't seen anyone else mention this, so I guess I will.
>
> One of my photography books notes that if you shoot astronomical objects,
> you need to keep the shutter speed at 1/2 second or faster. Anything
> slower, and the effects of the earth's rotation begin to show--detail on
> the moon blurs, and stars begin to elongate from points into elipses.
>
> Now of course, if you have an equatorial mount that follows the earth's
> rotation, you can long-expose to your heart's content. And the 1/2 second
> limit doesn't apply for things like star trails, aurorae, comets or the
> sun's corona during a total eclipse.
>
> --- Peter
> /\: ________ __ ========= , , , , , , |' , ,
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