Thread: Estimate the exposure time of this image?
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Old 18-06-2011, 06:50 PM
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stephenb (Stephen)
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Hi John, Your logic is perfect to me I was thinking about it too hard. Most of my old film star trails were either 10, 20 or 30 minutes, so 20 minutes is the one.
Last edited by stephenb; 19-06-2011 at 10:14 AM.
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