nikon d3100 digital cameras

Type Single-lens reflex digital camera
Lens mount Nikon F mount (with AF contacts)
Effective angle of view Approx. 1.5 x lens focal length (Nikon DX format)
Effective pixels
Effective pixels 14.2 million
Image sensor
Image sensor 23.1 x 15.4 mm CMOS sensor
Total pixels 14.8 million
Dust-reduction system Image sensor cleaning, Airflow Control System, Image Dust Off reference data (optional Capture NX 2 software required)
Storage
Image size (pixels) " 4,608 x 3,072 [L] " 3,456 x 2,304 [M] " 2,304 x 1,536 [S]
File format " NEF (RAW)
" JPEG: JPEG-Baseline compliant with fine (approx. 1:4), normal (approx. 1:8), or basic (approx. 1:16) compression
" NEF (RAW) + JPEG: Single photograph recorded in both NEF (RAW) and JPEG formats
Picture Control System Standard, Neutral, Vivid, Monochrome, Portrait, Landscape; selected Picture Control can be modified
Media SD (Secure Digital), SDHC and SDXC memory cards
File system DCF (Design Rule for Camera File System) 2.0, DPOF (Digital Print Order Format), Exif 2.21

Viewfinder Eye-level pentamirror single-lens reflex viewfinder
Frame coverage Approx. 95% horizontal and 95% vertical
Magnification Approx. 0.8 x (50 mm f/1.4 lens at infinity, -1.0 m-1)
Eyepoint 18 mm (-1.0 m-1)
Diopter adjustment -1.7 to +0.5 m-1
Focusing screen Type B BriteView Clear Matte Mark VII screen
Reflex mirror Quick return
Lens aperture Instant return, electronically

Compatible lenses " AF-S and 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 exposure mode M, but exposure meter does not function.
Note: Electronic rangefinder can be used if lens has a maximum aperture of f/5.6 or faster.
Shutter
Type Electronically controlled vertical-travel focal-plane shutter
Speed 1/4000 to 30 s in steps of 1/3 EV, Bulb
Flash sync speed X=1/200 s; synchronizes with shutter at 1/200 s or slower
Release
Release mode (single frame),(continuous),(self-timer),(quiet shutter release)
Frame advance rate Up to 3 fps (manual focus, mode M or S, shutter speed 1/250 s or faster, and other settings at default values)
Self-timer 2 s, 10 s
Exposure
Metering TTL exposure metering using 420-pixel RGB sensor
Metering method " 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
Range
(ISO 100, f/1.4 lens, 20°C/68°F) " Matrix or center-weighted metering: 0 to 20 EV
" Spot metering: 2 to 20 EV
Exposure meter coupling CPU
Exposure modes Auto modes (auto, auto [flash off]); scene modes (portrait; landscape; child; sports; close up; night portrait);
programmed auto with flexible program (P); shutter-priority auto (S); aperture-priority auto (A); manual (M)
Exposure compensation -5 to +5 EV in increments of 1/3 EV
Exposure lock Luminosity locked at detected value with AE-L/AF-L button
ISO sensitivity
(Recommended Exposure Index) ISO 100 to 3200 in steps of 1 EV; can also be set to approx. 1 EV above ISO 3200 (ISO 6400 equivalent) or to
approx. 2 EV above ISO 3200 (ISO 12800 equivalent); auto ISO sensitivity control available
Active D-Lighting On, Off
Focus
Autofocus Nikon Multi-CAM 1000 autofocus sensor module with TTL phase detection, 11 focus points (including one
cross-type sensor), and AF-assist illuminator (range approx. 0.5 to 3m/1 ft. 8 in. to 9 ft. 10 in.)
Detection range -1 to +19 EV (ISO 100, 20°C/68°F)
Lens servo " Autofocus (AF): Single-servo AF (AF-S); continuous-servo AF (AF-C); auto AF-S/AF-C selection (AF-A); predictive focus tracking activated automatically according to subject status
" Manual focus (MF): Electronic rangefinder can be used
Focus point Can be selected from 11 focus points
AF-area mode Single-point AF, dynamic-area AF, auto-area AF, 3D-tracking (11 points)
Focus lock Focus can be locked by pressing shutter-release button halfway (single-servo AF) or by pressing AE-L/AF-L button
Flash
Built-in flash Auto, Portrait, Child, Close up, Night portrait: Auto flash with auto pop-up
P, S, A, M: Manual pop-up with button release
Guide number Approx. 12/39, 13/43 with manual flash (m/ft, ISO 100, 20°C/68°F)
Flash control " TTL: i-TTL balanced fill-flash and standard i-TTL flash for digital SLR 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 matrixor center-weighted metering is selected)
" Auto aperture: Available with SB-900/SB-800 and CPU lens
" Non-TTL auto: Supported flash units include SB-900, SB-800, SB-80DX, SB-28DX, SB-28, SB-27, and SB-22S
" Distance-priority manual: Available with SB-900 and SB-800
Flash mode Auto, auto with red-eye reduction, fill-flash, auto slow sync, auto slow sync with red-eye correction, and rear curtain with slow sync
Flash compensation -3 to +1 EV in increments of 1/3 EV
Flash-ready indicator Lights when built-in flash or optional flash unit such as SB-900, SB-800, SB-600, or SB-400 is

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