APERTURE CONTROL

Large Aperture

Small Aperture

The size of the aperture (lens opening) determines the depth- of-field in the final image as well as the intensity of the light falling on the film. Depth-of-field is the area in front of and behind the point where the lens is focused which will appear sharp.

Large apertures (small numbers) limit the depth-of-field to a narrow range in front of and behind the point of focus. A narrow depth-of-field is used when you want to place greater visual emphasis on your main subject by blurring the background, as in the case of portraits. Small apertures (large numbers) provide greater depth-of-field, bringing an increasingly greater range into focus. A large depth-of-field is important when you are photographing landscapes to ensure the entire scene will be sharp.

•Usable apertures will depend on the aperture range of the lens you are using.

S MODE - SHUTTER PRIORITY

In S mode, you select the shutter speed and the camera automatically sets the aperture required for proper exposure. This mode is useful when you want to control subject blur.

1. Set the command switch to ASM.

2. Press the command- mode button until S appears in the data panel.

3. Turn the control dial to select the shutter speed.

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