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Within the Manual Mode Controls there are several Semi-Automatic controls, these are:
- Shutter Priority
- Aperture Priority
- ISO setting
Shutter Priority allows you to manually set the shutter speed for different effects and exposures.
When
Shutter Priority is used alone, without any other priority settings the
camera will automatically set exposure by adjusting the Aperture
opening, and/or ISO value to capture the best possible picture.
When
Shutter Priority is used you may have to adjust the ISO and/or Aperture
opening to obtain a correct exposure. You can preset the other
semi-manual settings to capture a desired effect, keeping in mind the
setting that is not manually changed will be set automatically by the
camera.
Examples using Shutter Priority:
- A fast
shutter speed (1/250sec.), or faster will stop most movement of the
camera, or subject; faster shutter speeds will stop motion in sporting
events (1/500sec).
- Slower shutter speeds (1/30sec.), or slower will allow for motion blur of moving subjects.
- Very slow shutter speeds (1sec, or longer) will cause moving subjects to become invisible in the exposure.
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- Long Shutter speeds will allow moving subjects to form a trail of light as the subject crosses the field of view.
- Fireworks bursting in air.
- Vehicle traffic lights trailing along the curving highway.
- Stars creating their own trails as the earth rotates about its axis.
Keep
in mind that as you change shutter speed you may have to adjust the
Aperture and/or ISO to capture both the desired exposure and
photographic effect.
Practice is the only learning tool to
achieve good photos, and digital photography provides the least
expensive method of learning these techniques. |
