Nikon D3100 Reference Manual page 212

Lens
Compatible lenses
Shutter
Type
Speed
Flash sync speed
Release
Release mode
Frame advance rate
Self-timer
Exposure
Metering
Metering method
Range (ISO 100, f/1.4
lens, 20 °C/68 °F)
Exposure meter
coupling
Mode
Exposure compensation –5 – +5 EV in increments of
Exposure lock
n
196
• AF-S or AF-I: All functions supported.
• Type G or D AF NIKKOR without built-in autofocus motor: All functions except
autofocus supported. IX NIKKOR lenses not supported.
• Other AF NIKKOR: All functions supported except autofocus and 3D color
matrix metering II. Lenses for F3AF not supported.
• Type D PC NIKKOR: All functions supported except autofocus and some
shooting modes.
• AI-P NIKKOR: All functions supported except autofocus and 3D color
matrix metering II.
• Non-CPU: Autofocus not supported. Can be used in mode M, but
exposure meter does not function.
Electronic rangefinder can be used if lens has a maximum aperture of
f/5.6 or faster.
Electronically-controlled vertical-travel focal-plane shutter
1
/ – 30 s in steps of
4000
1
X= / s; synchronizes with shutter at
200
8 (single frame), I (continuous), E (self-timer), J (quiet shutter
release)
Up to 3 fps (manual focus, mode M or S, shutter speed
other settings at default values)
2 s, 10 s
TTL exposure metering using 420-pixel RGB sensor
• Matrix: 3D color matrix metering II (type G and D lenses); color matrix
metering II (other CPU lenses)
• Center-weighted: Weight of 75% given to 8-mm circle in center of frame
• Spot: Meters 3.5-mm circle (about 2.5% of frame) centered on selected
focus point
• Matrix or center-weighted metering: 0–20 EV
• Spot metering: 2–20 EV
CPU
Auto modes (i auto; j auto (flash off )); scene modes (k portrait;
l landscape; p child; m sports; n close up; o night portrait);
programmed auto with flexible program (P); shutter-priority auto (S);
aperture-priority auto (A); manual (M)
Luminosity locked at detected value with AE-L/AF-L button
1
/ EV, bulb
3
1
/ s or slower
200
1
/ EV
3
1
/ s or faster, and
250