On 10/19/2011 11:40 PM, Joseph McAllister wrote:
On Oct 14, 2011, at 14:04 , Matthew Hunt wrote:
Don't you just wait for twice the exposure time for the final result? I
haven't tried star trails. My longest K20D exposure has been something like
5 minutes.
Star trails from DSLRs are usually assembled from multiple exposures
(otherwise you build up too much background from dark current and sky
brightness). So if the noise reduction makes you do 5 minutes on the
sky, then 5 minutes dark, then 5 sky, 5 dark, etc., you'll have
interruptions in your star trails, and the combined result will look
like dashed lines.
Don't we all still have "film" cameras?
Film? That's so 20th century.
Joseph McAllister
Pentaxian
http://gallery.me.com/jomac
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