Nikon D100 Product Manual - Page 60

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/ EV. Higher values of HI-1 (approximately equiva- 3 lent to ISO 3200) and HI-2 (approximately equivalent to ISO 6400) are also available for situations in which high sensitivity is a priority. Sensitivity can be adjusted using the function dial, or using the ISO option in the shooting menu. The ISO Menu Highlight ISO in the shooting menu ( press the multi selector to the right. 139) and SHOOTING MENU Bank Select Image Quality Resolution White Bal ISO A NORM L A 200 The menu shown at right will be displayed. After pressing the multi selector up or down to highlight the desired option, press the multi selector to the right to put your choice into effect and return to the shooting menu. SHOOTING MENU ISO 200 OK 250 320 400 HI-1/HI-2 The higher the sensitivity, the more likely pictures are to be subject to "noise" in the form of randomly-spaced, brightly-colored pixels. Photos taken at settings of HI-1 and HI-2 will likely contain appreciable amounts of noise. Use only to capture natural lighting under low light conditions or when a fast shutter speed is required to prevent blurring. We recommend that image sharpening ( 58) be turned off at these settings to avoid heightening the effects of noise. 48