Wednesday, 15 July 2015

terminology - What are shutter actuations?


I was just reading the question How many actuations are "too many actuations"? and trying to figure out what a shutter "actuation" actually is.


The only thing I can guess is that it's the number of times the shutter is released and restored — i.e. how many photos the camera has taken — but values of 50-100k don't seem like that many. Is that really what it is?


Why is the word "actuations" used here? Is it a term manufacturers use to sound fancy or to mask that modern cameras might fail after 100,000 images?


What happens when 100k is reached (or whatever the actual lifespan is) — does the shutter fail in a way that damages the camera? Can it be repaired, or is it effectively the end of that camera body's life?




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