55 561. Hold down the button and turn theexposure mode setting dial to “Av” (aperture-priority AE) position.Aperture Priority AE (Av)Set the desired aperture, and the camera selects the optimum shutter speed accord-ingly. Use the Av mode to maintain specific control over depth of field, i.e. takingportraits or landscapes.2. Turn the front or rear dial to set the desiredaperture.The shutter speed value will blink when the subject is too dark or too bright for acorrect exposure. To obtain the correct aperture, adjust the aperture value until theshutter speed value stops blinking and remains lit.When the exposure is compensated with the rear dial (see pages 63 and 64), theaperture can be set with the front dial only.1. Hold down the button and turn theexposure mode setting dial to “Tv” (shutter-priority AE) position.Shutter Priority AE (Tv)Set the desired shutter speed and the camera selects the optimum aperture accord-ingly. Fast shutter speed can be used to freeze motion, and slow shutter speed can beused to blur motion on purpose.2. Turn the front or rear dial to set the desiredshutter speed..The aperture value will blink when the subject is too dark or too bright for a correctexposure. To obtain the correct aperture, adjust the shutter speed value unitl theaperture value stops blinking and remains lit.When the exposure is compensated with the rear dial (see pages 63 and 64), theshutter speed can be set with the front dial only.1. Increment of the aperture can be set at either 1/3 or 1/2-stop.Custom settings (C-01 on page 88)2. Rotation direction of the dials to change the values can be altered.Custom settings (C-15 on page 90)3. The selected aperture level can be locked. Page 771. Increment of the shutter speed can be set at either 1/3 or 1/2-stop.Custom settings (C-01 on page 88)2. Rotation direction of the dials to change the values can be altered.Custom settings (C-15 on page 90)3. The selected aperture level can be locked. Page 77