Nikon D100 - Manual (Page 60)

48
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. Higher values of HI-1 (approximately equiva-
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 (
139) and
press the multi selector to the right.
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 light-
ing 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.
Bank Select
Image Quality
Resolution
White Bal
ISO
A
NORM
A
200
L
SHOOTING MENU
OK
ISO
200
250
320
400
SHOOTING MENU
The menu shown at right will be displayed. After
pressing the multi selector up or down to high-
light the desired option, press the multi selector
to the right to put your choice into effect and re-
turn to the shooting menu.