Nikon 25214 D70 User's Guide - Page 56

Taking Photographs-Sensitivity (ISO Equivalency) Sensitivity (ISO Equivalency) Reacting Faster to Light "Sensitivity" is the digital equivalent of film speed. The higher the sensitivity, the less light needed to make an exposure, allowing higher shutter speeds or smaller apertures. Sensitivity can be set between values roughly equivalent to ISO 200 and ISO 1600 in steps equivalent to 1/3 EV. Sensitivity can be adjusted using the ISO option in the shooting menu or by pressing the ISO button and rotating the main command dial. The ISO Menu 1 Highlight ISO in the shooting menu ( 132) and press the multi selector to the right. Optimize image N Long exp. NR OFF Image quality NORM Image size White bal. A ISO 200 2 Highlight the desired option and press the multi selector to the right. The shooting menu ISO 200 OK will be displayed. 250 320 400 500 Sensitivity The higher the sensitivity, the more likely pictures are to be subject to "noise" in the form of randomly-spaced, brightly-colored pixels. 5-ISO Auto ( 142) When On is selected for Custom Setting 5 (ISO auto), the camera will automatically vary sensitivity from the value selected by the user to help ensure optimum exposure. 46