3 Advanced Operations55ISO speed is an index number representing the photosensitivity of silver-halide film. Digitalcameras do not use film, but their photosensitivity is commonly described in terms of “ISOequivalent” speed settings. (132)The higher the number, the greater the sensitivity. Higher speeds are better for taking picturesof moving subjects or in dim light, but the pictures will also contain more noise and so will beless sharp. Conversely, lower speeds are less suited to moving subjects or dim conditions, butproduce sharper, more detailed images.The Canon EOS D30 provides ISO-equivalent speed settings from ISO 100 to ISO 1600, inone-step increments.1 Select [ISO Speed]. Press the 〈MENU〉 button. Turn the 〈 〉 dial to select [ISO Speed],then press the 〈 〉 button.2 Set the ISO speed. Turn the 〈 〉 dial to select the desired ISOspeed, then press the 〈 〉 button.The selected ISO speed is entered, andthe screen returns to the Menu. Press the 〈MENU〉 button to clear thescreen and exit the Menu.You can set the ISO speed by pressing the 〈 〉 button and turning the 〈 〉 or〈 〉 dial as you look at the LCD panel. (C.Fn-12-2 128)About ISO Speed
