Nikon D3100 User Manual page 289

Exposure
ISO 100 – 3200 in steps of 1 EV; can also be set to approx. 1 EV above ISO
ISO sensitivity
(Recommended 3200 (ISO 6400 equivalent) or to approx. 2 EV above ISO 3200 (ISO 12800
equivalent); auto ISO sensitivity control available
Exposure Index)
On, off
Active D-Lighting
Focus
Nikon Multi-CAM 1000 autofocus sensor module with TTL phase
Autofocus
detection, 11 focus points (including one cross-type sensor), and AF-
assist illuminator (range approx. 0.5–3 m/1 ft. 8 in.–9 ft. 10 in.)
–1 – +19 EV (ISO 100, 20 °C/68 °F)
Detection range
• Autofocus (AF): Single-servo AF (AF-S); continuous-servo AF (AF-C); auto
Lens servo
• Manual focus (MF): Electronic rangefinder can be used
Can be selected from 11 focus points
Focus point
AF-area mode Single-point AF, dynamic-area AF, auto-area AF, 3D-tracking (11 points)
Focus can be locked by pressing shutter-release button halfway (single-
Focus lock
servo AF) or by pressing AE-L/AF-L button
Flash
i, k, p, n, o: Auto flash with auto pop-up
Built-in flash
P, S, A, M: Manual pop-up with button release
Approx. 12/39, 13/43 with manual flash (m/ft, ISO 100, 20 °C/68 °F)
Guide Number
• TTL: i-TTL balanced fill-flash and standard i-TTL flash for digital SLR
Flash control
• Auto aperture: Available with SB-900/SB-800 and CPU lens
• Non-TTL auto: Supported flash units include SB-900, SB-800, SB-80DX,
• Distance-priority manual: Available with SB-900 and SB-800
• i, k, p, n: Auto, auto with red-eye reduction, off; fill-flash and red-
Flash mode
• o: Auto slow sync, auto slow sync with red-eye reduction, off; slow
• l, m: Fill-flash and red-eye reduction available with optional flash
• P, A: Fill-flash, rear-curtain with slow sync, slow sync, slow sync with
• S, M: Fill-flash, rear-curtain sync, red-eye reduction
AF-S/AF-C selection (AF-A); predictive focus tracking activated
automatically according to subject status
using 420-pixel RGB sensor are available with built-in flash and SB-900,
SB-800, SB-600, or SB-400 (i-TTL balanced fill-flash is available when
matrix or center-weighted metering is selected)
SB-28DX, SB-28, SB-27, and SB-22S
eye reduction available with optional flash units
sync and slow sync with red-eye reduction available with optional
flash units
units
red-eye reduction, red-eye reduction
n
197