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Old 31-10-2013, 07:38 AM
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philiphart (Phil Hart)
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Join Date: Jan 2007
Location: Melbourne
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If you're trying to take even moderately high res shots of the Moon or anything else at focal lengths greater than 500mm (perhaps even less) with exposures in the range 1/250 sec to ~2 secs then Mirror Lockup will for sure reduce vibration which will affect your image.

For very fast exposures (eg 1/1000) then the vibration is frozen by the shutter speed and for very long exposures it becomes irrelevant unless your mounting is poor and vibration bad.
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