57Set the ISO speed (image sensor’s sensitivity to light) to suit theambient light level. In the Basic Zone modes, the ISO speed is setautomatically.1 Press the <Z> button. (9)X [ISO speed] will appear.2 Select the ISO speed.Turn the <6> dial or press the<V> key to select the ISO speed.You can also look at the ISO speed inthe viewfinder while turning the<6> dial.ISO Speed GuideAbout Auto ISOThis mode sets the ISO speed automatically between ISO 100 - 800 tosuit the shooting mode and ambient light level. For flash and <a>(manual) exposures, ISO 400 is set. When you press the shutter buttonhalfway, the automatically-set ISO speed is displayed in the viewfinderand on the LCD monitor.Z: Changing the ISO SpeedNISO Speed Normal (No flash) Flash Range100/200 Sunny outdoors The higher the ISO speed, thefarther the flash range will be.(p.58)400/800 Overcast skies, evening1600 Night or dark indoorsUsing a high ISO speed or shooting in high-temperature conditions mayresult in more grainy images. Long exposures can also cause irregularcolors in the image.Under the [7 Custom Functions (C.Fn)] menu, if [Highlight tonepriority] (p.156) is set to [1: Enable], the settable ISO speed range willbe ISO 200 - 1600.
