Wednesday 5 April 2017

Does every frame of video (or live view) on a DSLR count as a shutter actuation?


From time to time I see questions about shutter actuations on this site and this got me thinking — does every frame of video count as an actuation?


Does this means a 10 minute video is "worth" 18000 actuations (10minutes*30fps)? And then what about live view?



Obviously, I'm talking only about cameras with a mechanical shutter. My camera is a Canon 550D but I assume this will be the same for every camera make and model.



Answer



No, for a CMOS based dSLR, the shutter remains open during the video recording, so the shutter in use is actually electronic. B&H photo, by the way, have a pretty good article on some of the concepts. It's in reference to video recorders, but much, not all, of it applies to dSLRs as well.


Anyways, you do have an actuation for the act of flipping the mirror and opening the real shutter, but after that it's just sensor activity. A far cry from the 18,000 otherwise. :)


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