Sensor and Resolution:
The D3100 features a 14.2-megapixel DX-format CMOS sensor, providing decent image quality.
It has a maximum resolution of 4608 x 3072 pixels.
LCD Monitor:
The camera comes with a 3.0-inch LCD monitor (230,000 dots) for composing and reviewing shots.
Image Sensor Cleaning:
The D3100 includes sensor shake technology for effective image sensor cleaning.
Autofocus System:
It has 11 autofocus points with 3D tracking, ensuring accurate focus on your subject.
ISO Range:
The ISO range spans from 100 to 3200 (expandable up to 12,800), allowing flexibility in various lighting conditions.
HD Movies:
The D3100 supports HD video recording at 1080p, 720p, or WVGA resolution.
It’s the first Nikon DSLR to offer 1920x1080 movie recording.
Connectivity Ports:
The camera includes USB, A/V, GPS, and mini-HDMI ports behind a rubber flap on the left side of the body12.
The Accessory port allows connection with an optional GPS receiver unit.