Canon Digital Rebel EOS DIGITAL REBEL/EOS 300D DIGITAL Instruction Manual - Page 50
Setting the ISO Speed
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D Setting the ISO Speed The ISO speed is a numeric indication of the sensitivity to light. A higher ISO speed number indicates a higher sensitivity to light. Therefore, a high ISO speed is suited for moving subjects or shooting 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. ISO Speed in the Basic Zone Modes The ISO speed is set automatically within ISO 100-400. (ISO) YUI OPA S Normal (No flash) Auto* 100 Auto* Auto* 400 Auto* Auto* With built-in flash 400** 100 400** 400** With external Speedlite 100 100 100 100 400 100 * Automatically set within ISO 100-400. ** For daytime backlit conditions, ISO 100 is set. ISO Speed in the Creative Zone Modes You can set the ISO speed to or " ". 1 Press the (ß) button. (∫) s The current ISO speed will be displayed on the LCD panel. Set the ISO speed. 2• While looking at the LCD panel, turn the dial to set the desired ISO speed. • To return to shooting, press the shutter button halfway. • The higher the ISO speed and the higher the ambient temperature, the more noise the image will contain and the larger the image file size will be. • High temperatures, high ISO speeds, or long exposures may cause irregular colors in the image. 50