How to Change the Aperture on a Sony Alpha

Written by suzette barnard
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How to Change the Aperture on a Sony Alpha
A camera's aperture setting affects the depth of field of an image. (Bees on a blue flower image by Janene spencer from

Among the shooting modes of the Sony Alpha line of digital SLR cameras is aperture-priority, which allows the user to change the amount of light coming through the lens. The photographer sets the aperture, also called an f-stop. The camera then sets the appropriate shutter speed according to the lighting conditions. Shooting in aperture-priority gives the photographer control over the depth of field of the image. A lower f-stop means more light is coming through the lens. With more light, the less depth of field an image has -- the subject and foreground will be in focus and the background will blur.

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  1. 1

    Turn on the camera.

  2. 2

    Move the mode dial to "A" to activate the aperture-priority setting.

  3. 3

    Twist the control dial, found on the top-right corner of the camera, to select the desired aperture. Find the current aperture value on the top-right corner of the LCD monitor, indicated next to the "F."

  4. 4

    Look through the viewfinder while pressing the depth of field preview button, found just below the lens, to see how your picture will appear.

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