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Photographers can make a moving object appear static in the
photo, or intentionally make it blurred by adjusting the shutter speed. In the photos below, the bicycle
passing in front of the camera placed on the tripod was shot at different shutter speeds. The moving bicycle
stands completely still at a shutter speed of 1/500 second. At a shutter speed of 1/250 second, the external
circumference of the bicycle wheels begins to become blurred. At 1/125, the bicycle rider is quite blurred,
and the blurring increases as the shutter speed gets slower, down to 1/60, 1/30 and 1/15 second. If you
intend to take a photo of a static bicycle, a shutter speed of at least 1/500 seconds will be required. |
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| 1/500 |
1/250 |
1/125 |
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| 1/60 |
1/30 |
1/15 |
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Next, we shot the passing bicycle at the same shutter speeds,
but this time, we followed it with the camera. This technique is called cruise shooting. It makes the background
look as if it were moving, instead of the bicycle. At shutter speeds of 1/500 and 1/250 seconds, the blurring
is minor, and the effect of cruise shooting is not visible. At 1/125 second, the background begins to blur.
At 1/60 second, the background blurs dynamically. At 1/30 second or less, extraneous blurring such as the
upward and downward movements of the bicycle rider is quite conspicuous. |
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| 1/500 |
1/250 |
1/125 |
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| 1/60 |
1/30 |
1/15 |
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Since the effect of cruise shooting differs according to area
on which the lens is focused, it is advisable to test what shutter speed is required to get the effect
you want.
The photos below indicate how the moving subject is represented at different shutter speeds. Please pay attention to
how the movement of the water looks as the shutter speed changes. |
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There is no correct answer. If the photo represents what the
photographer intended, it can be said that the photo is a success. |
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| Changing the shutter speed gives the photos these different
impressions. |
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There are two modes with automatic exposure. One is Shutter
Speed Priority AE (Tv Mode in Canon) in which photographer selects the shutter speed first, and the camera
determines the corresponding aperture.
In Shutter Speed Priority AE, the photographers first select the shutter speed to suit their intention. (In this example,
1/500 second was selected.) Then, the camera automatically determines the aperture. (In this example, f8 was selected.) If
the photographer applies exposure compensation, he or she changes the aperture determined by the camera. On the "Exposure
Compensation" page, explanations were given about positive compensation, which means compensation to increase the light,
and negative compensation, which means compensation to decrease the light. In this section, opening the aperture, or reducing
the aperture value, corresponds to positive compensation. Closing the aperture, or increasing the aperture value, corresponds
to negative compensation. |
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When Set to 1/500 Second in the Shutter Speed Priority (Tv) Mode
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