HI Steve.
Your right. In my images, at the size you've seen, the stars look pretty
much like points. If I blow it up in Photoshop I can see that they're
actually short trails.
This tells me if I had actually had my aperture at 1.9 instead of 2.8 I
could have gotten the same aurora exposure with much less visible trailing
in about a 20 sec exposure/ maybe down to around 15 sec. if I used an f1.4.
Tom C.
Steve Sharpe writes:
> It's all trade offs. The longer exposures will show more stars, but
> they will be trailed due to the Earth's rotation. The aurora will
> appear brighter and more colourful as well, but if it is an active
> one with a lot of movement then the detail will be smeared.
> --
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