LOCsta From United States of America, joined Sep 2006, 306 posts, RR: 7 Posted (5 years 11 months 3 days 15 hours ago) and read 4149 times:
Does anyone know the amount of time it takes for the shutter to close and open again during a high speed burst (10fps)?
In particular, the 1D mk III.
I imagine no matter what shutter speed you use there will be the constant of the actual time it takes the shutter to close and reopen for the next exposure, or is it somehow connected to the selected shutter speed?
AndyEastMids From United Kingdom, joined Jan 2001, 1089 posts, RR: 1
Reply 3, posted (5 years 11 months 3 days 5 hours ago) and read 4065 times:
Quoting LOCsta (Thread starter): I imagine no matter what shutter speed you use there will be the constant of the actual time it takes the shutter to close and reopen for the next exposure, or is it somehow connected to the selected shutter speed?
Most shutters don't open completely at higher shutter speeds (usually above 1/250sec or so)... The two shutter curtains move in parallel a certain distanceapart (from top-to-bottom or side-to-other-side depending on whether its a vertical or horizontal shutter mechanism), exposing just a section/slot of the film or sensor as they move - imagine the shutters as being two curtains, one starting to travelling first and uncovering a part of the width or height of the sensor, and then the second one starting travelling very shortly afterwards, resulting on a portion of the sensor/film - either a vertical or horizontal slot - being exposed at any given moment.
This is why flash will not sync at all shutter speeds - the fastest shutter speed that results in the entire frame being open at once is best flash sync speed. Because the duration of the flash is very brief, any shutter speed above that exposing the entire frame at once would result in a portion of the image being covered by the shutter blades at the time the flash fired.
Having said that, there is the time it takes for the shutter curtains to move back to their start position having previously moved across the frame during the exposure, which will form a lag before the next photo can be taken.