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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