That much I knew. The question really was how long an exposure can you
get away with? But the answer is in your link since the subject photo
is a 5 minute exposure on a 20D. That should be plenty long enough to
walk the length of the Acela.
Chuck Norcutt
Manuel Viet wrote:
> Le mardi 14 Novembre 2006 17:24, Chuck Norcutt a écrit :
>
>>Has anyone here ever done light painting with a digital? I'm wondering
>>if the long exposure required for the time to walk the length of the
>>train would allow a buildup of noise. I've never tried an exposure on
>>the 5D of more than a couple of seconds.
>
>
> As noise in pictures is directly related to sensor heating, the longer you
> operate the sensor, the noisier it gets.
> http://www.astropix.com/HTML/J_DIGIT/JPG_DFS.HTM
>
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