Canon EOS-1D EOS-1D Instructions - Page 49
Setting the ISO Speed
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Setting the ISO Speed The 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 speed is suited for moving subjects or taking pictures in low-light conditions. However, the image will contain more noise to make it look coarse or grainy. On the other hand, a low ISO speed will make 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 200, 250, 320, 400, 500, 640, 800, 1000, 1250, or 1600. The ISO speed is initially set to 200. 1 Hold down the < > and < tons simultaneously. > but- s The < > icon and current ISO speed will be 2 displayed on the top LCD panel. Settings for Images 2 While still pressing the two buttons, turn the < > dial to select the desired ISO speed displayed. 3 Let go of the buttons. s The new ISO speed will be set. The higher the set ISO speed, the more noise will appear in the image. Also, image file size will grow and you will be able to record fewer images on the CF card. Therefore, setting a higher ISO speed will reduce the number of images that the CF card can store. On the top LCD panel, you can check the number of images the CF card can hold. (→p.27) With C.Fn-03-1, you can set sensitivity at ISO 100 or 3200. (→p.133) •• With C.Fn-08-1/2, you can display the ISO speed instead of the number of remaining shots. (→p.135) 49