The shutter in a camera opens in order to let light in. It does so in varying amounts of time, depending on the amount of light needed. These amounts of time can be shorter or longer. As far as I have understood the shutter is like a curtain that moves. That movement has a speed. But this speed has nothing to do with the amount of time the shutter is open (to let in light). Using the term shutterspeed (emphasis on speed) one gets the impression that the speed by which the shutter moves at an aperture of 1/4 seconds is 1000 times faster (FASTER) than at an aperture of 1/4000. I am not a qualified mathematician or engineer, but this strikes me as highly unlikely. Still in the photographic world it is quite common to utter this nonsense. It always confuses me when i read about faster speeds.... In my native language we speak of 'sluitertijd'. 'Sluiter' is shutter and 'tijd' translates as time. Well.... That makes sense. The shutter is open for a while, longer or shorter periods of time. My question is to all of you - here on mu-43 - if you are not a native english speaker. What form does your native tongue choose: the speed or the time (or any other way to describe aperture).