PHOTOKNOWLEDGE – ANTI-SHAKE
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Despite autofocus it is still possible that pictures may be blurred. Often it is not the fault of the autofocus system but rather the result of camera shake. Unfortunately camera shake happens frequently and it is a particular problem when using slower shutter speeds and longer focal lengths.
However, Konica Minolta’s
THE CORRECT AMOUNT OF LIGHT
To expose a picture correctly a particular amount of light is necessary. For that the camera has two possibilities to control the amount of light. Either the aperture can be changed or the exposure time can be varied.
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The
the camera shake by shifting the CCD.
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| Rule of thumb to calculate the longest safe shutter | ||
| speed without | ||
| 1 | s | |
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The | focal length (in mm) | ||
to compensate camera motion. (Shutterspeed example picture |
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1/30 sec) |
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For example, when taking a picture with a lens of focal length 250 mm without
1/250 mm = 1/250 s