Aperture-Priority AE. Canon EOS 5DS, EOS 5DS R

f

: Aperture-Priority AE

In this mode, you set the desired aperture and the camera sets the shutter speed automatically to obtain the standard exposure suiting the subject brightness. This is called aperture-priority AE. A higher f/number (smaller aperture hole) will make more of the foreground and background fall within acceptable focus. On the other hand, a lower f/number (larger aperture hole) will make less of the foreground and background fall within acceptable focus.

* < f > stands for Aperture value (aperture opening).

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Blurred background

(With a low aperture f/number: f/5.6)

Sharp foreground and background

(With a high aperture f/number: f/32)

1

Set the Mode Dial to <

f

>.

2

Set the desired aperture.

While looking at the LCD panel or in the viewfinder, turn the < 6 > dial.

3

Focus on the subject.

Press the shutter button halfway.

X The shutter speed is set automatically.

4

Check the viewfinder display and shoot.

As long as the shutter speed is not blinking, a standard exposure will be obtained.

f : Aperture-Priority AE

If the “ 30" ” shutter speed blinks, it indicates underexposure.

Turn the < 6 > dial to set a larger aperture

(lower f/number) until the shutter speed blinking stops or set a higher ISO speed.

If the “ 8000 ” shutter speed blinks, it indicates overexposure.

Turn the < 6 > dial to set a smaller aperture (higher f/number) until the shutter speed blinking stops or set a lower ISO speed.

Aperture Display

The higher the f/number, the smaller the aperture opening will be. The f/number displayed will differ depending on the lens. If no lens is attached to the camera, “ 00 ” will be displayed for the aperture.

Depth-of-Field Preview

N

The aperture opening (diaphragm) changes only at the moment when the picture is taken. Otherwise, the aperture remains fully open.

Therefore, when you look at the scene through the viewfinder or on the

LCD monitor, the depth of field will look narrow.

Press the depth-of-field preview button to stop down the lens to the current aperture setting and check the depth of field (range of acceptable focus).

A higher f/number will make more of the foreground and background fall within acceptable focus. However, the viewfinder will look darker.

While looking at the Live View image (p.256), you can change the

aperture and press the depth-of-field preview button to see how the depth of field changes.

The exposure will be locked (AE lock) while the depth-of-field preview button is pressed.

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