I don't know if this is "beyond basics" or if it's simply a basic question. I have heard of a property called "shutter cycle durability", or something like that... I am not really sure about the exact name of it, but it basically puts a limit on the number of time a camera can be used until it breaks down.. or at least a part of it... But what I don't understand is, if the shutter is inside the lens, why does it affect the camera? Can someone explain to me this limit? Thank you!