49Settings for Images2Setting the ISO SpeedThe ISO speed is a numeric indication of the sensitivity to light. (→p.154)A higher ISO speed number indicates a higher sensitivity to light. Therefore, a high ISO speedis suited for moving subjects or taking pictures in low-light conditions. However, the image willcontain more noise to make it look coarse or grainy. On the other hand, a low ISO speed willmake the image look finer, but it is not suited for freezing motion or shooting in low light.The camera can be set to any of the following ISO speeds: ISO 100, 125, 160, 200, 250, 320,400, 500, 640, 800, 1000, or 1250.Hold down the < > and < > but-tons simultaneously.s The < > icon and current ISO speed will bedisplayed on the top LCD panel.1While still pressing the two buttons, turnthe < > dial to select the desired ISOspeed displayed.2Let go of the buttons.s The new ISO speed will be set.3When higher ISO speed is set or the camera is used under higher temperature,more noise will appear in the image. In this case, image file size will grow and fewerimages will be recorded on the CD card. Number of shots remaining can beconfirmed on the top LCD panel. (→p.27)• With C.Fn-03-1, you can set sensitivity at ISO 50. (→p.133)• With C.Fn-08-1/2, you can display the ISO speed instead of the number ofremaining shots. (→p.135)
