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Aperture-priority

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Aperture-Priority Mode
When precisely controlling depth of field (the area that's in focus in front of and behind a subject) is important to the photograph, use the Aperture-Priority mode.

 


Aperture-priority describes a metering method which recommends (or sets automatically) a shutter speed based on the aperture set by the user.
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Glossary Terms ...

Aperture-priority mode. An automatic exposure system in which the photographer sets the aperture (f-stop) and the camera selects a shutter speed for normal exposure.

Aperture-Priority
Select an aperture (f/stop) and the camera chooses the best shutter speed. Use this mode to control the depth of field, e.g.

Aperture-Priority Auto
In this mode you select the aperture and the camera will calculate the correct shutter speed depending on metered exposure, exposure compensation and ISO sensitivity. Turn the main dial to select aperture (in 0.3or 0.

11 - Program, shutter-priority AE, aperture-priority AE, Manual, Auto, Portrait, Landcape, Close up, Sports, Night Landscape, Night Portrait.
Metering Zones
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Automatic Exposure; Three kinds are available: programmed auto exposure, aperture-priority auto exposure and shutter-priority auto exposure.
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You can't bracket shots when you use program, aperture-priority, or shutter-priority modes by changing shutter speeds or aperture. The camera automatically adjust settings to give what it thinks is the correct exposure.

Professional photographers most typically use an exposure mode called "aperture-priority autoexposure". The photographer picks the aperture and the camera picks the shutter speed. Does it matter what shutter speed the camera picks?

Over the years cameras have become more sophisticated and now offer several automated modes including Program (P) - a fully automatic exposure mode that sets the aperture and shutter speed; Aperture-priority mode (AP) where the user selects the ...

Similarly, many auto-exposure cameras allow you to select "aperture-priority" or "shutter-priority" for exposure (see "exposure" to learn why).

Other SLR's soon followed, but because of limitations with their lens mounts, the manufacturers of these cameras had to choose 'aperture-priority' automation, where the camera's metering system selects the correct shutter speed.

You can use either aperture-priority automatic mode (where you set the aperture, and the camera chooses the shutter speed), or in full manual mode, where you set both the shutter speed and the aperture.

More important to basketball, though, the camera gives you a choice of shutter-priority, aperture-priority, manual, or fully automatic modes.

Aperture-Priority Auto: User selects aperture and camera sets matching shutter speed for correct exposure.
Manual: User selects both shutter speed and aperture, following or ignoring the meter's recommendations to achieve the desired exposure.

Aperture-priority mode lets you select the aperture needed to obtain the depth of field you want and the exposure system automatically sets the shutter speed to give you a good exposure. You select this mode whenever depth of field is most important.

See also: Aperture, Speed, Shutter, Camera, Light