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Shutter speed

How long the camera shutter remains open to let light onto the film

Shutter speed denotes the time that the shutter remains open when taking a picture. It is measured in fractions of a second (so you can imagine that each number has a 1/ in front of it): the bigger the number, the faster the speed. Just as with aperture stops, shutter speeds are set as stops on a scale.

Typical shutter speed scale:
1 1/2 1/4 1/8 1/15 1/30 1/60 1/125 1/250 1/500

Each of the numbers in this sequence (each stop) represents a halving to the right, or doubling to the left of the amount of light from its immediate neighbour.

If you want to avoid motion blur and achieve sharp images, assuming a normal camera and a steady hand, you should use a minimum shutter speed equal to 1 over the focal length of the lens i.e. a 28 mm lens can be held steady at 1/28 (1/30). If your shutter speed is slower than the reciprocal of the focal length of your lens, you should use a tripod to achieve a sharp image.

As a general rule you can’t achieve sharp shots at speeds slower than 1/60, but with rangefinder cameras (see Rangefinder Vs. SLR) because there is no vibration from mirror slap people say they can go down to 1/30 although this is below the reciprocal of a 45mm lens. Legend has it that Cartier Bresson could shoot hand held at 1/4, but as a rule stick to 1/60 and you’ll avoid unwanted motion blur.

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About Ilott Vintage

A valuable reference for anyone wanting to learn more about rangefinder cameras, manual film photography, or both, this website is intended to serve not only as a resource to discover some amazing objects but also as a place to learn more about them, to understand exactly what they are capable of, and why. Read More

See Also
  • Minolta V2 The world's first 1/2000 leaf shutter camera
  • Fujica 35SE Beauty meets Beast
  • Konica Auto S
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    Friday 2nd June 2023