Amateur Photographer Magazine

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So the smaller the shutter speed number, the faster the speed? EG 1/20th is faster than 1/60th? I've just got my head around apertures being back to front, now this, lol.

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The shutter speed is just what you'd expect it to be - the length of time that the shutter is open, allowing light onto the sensor. The only confusion is that the camera displays don't show "1/60", they simplify it to just read "60", assuming you know it will be 1/60th of a second and not 60 seconds (just don't ask about exposures longer than 1 second!!!... they are usually shown in a slightly different form so you can tell the difference).

If you change the shutter speed from 1/60th to 1/30th (i.e. twice the time) whilst not changing the aperture, you let twice as much light to fall on the sensor, equivalent to 1 stop of extra exposure and making the picture look lighter.

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John

Who could suppose that angels move the stars, or be so superstitious as to suppose that because one cannot see one's soul at the end of a microscope, it does not exist?

R.D.Laing The Politics Of Experience

http://www.flickr.com/photos/john_gass

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