Nikon D3100 DSLR Camera Kit with 18-55mm DX non-VR Lens, Camera Bag and 8GB Memory Card

The D3100 is equipped with a Nikon DX-format CMOS image sensor and a the EXPEED 2 image-processing engine, both developed by Nikon. The CMOS image sensor offers an effective pixel count of 14.2-million pixels (D3000: CCD image sensor with 10.2-million effective pixels) and enables capture of high-definition images exhibiting superior image quality with extremely detailed rendering and rich tones. The camera also makes the most of its standard sensitivity settings up to ISO 3200 (D3000: ISO 100–1600) and additional increases up to Hi 2 (ISO 12800 equivalent), with shooting under dim lighting, such as in the evening or indoors, as well as with sports scenes of rapidly moving subjects. 

EXPEED 2 is a Nikon image-processing engine, developed by refining the concepts, know-how and technologies regarding digital images that Nikon has spent years cultivating. It maximises the performance of the CMOS image sensor to suppress noise in still images and movies and produces images that faithfully reproduce vivid colors.

In Guide Mode the D3100 displays "assist images" that show the effect of various camera settings, giving users an idea of the results they can expect with specified settings. For example, when "Soften backgrounds" is selected and an aperture value is specified, the assist image displayed in the monitor changes to show the effect that aperture setting will have on images. This allows users to confirm that images will appear as they intended prior to shooting and reduces the number of unsuccessful shots.

By simply rotating the live view switch, the view through the lens is displayed in the monitor, enabling immediate live view recording. This makes shooting feel more like shooting with a compact digital camera, easing the transition to digital-SLR for beginners. In addition, various information such as the shooting mode, time remaining (movie mode) and battery indicator, can be shown in the live view display.

The D3100 is equipped with the D-Movie function that enables recording of high-definition movies (with monaural sound) by simply pressing the movie-record button. Movies can be recorded with the same aperture and other settings applied in Guide mode, and movies that take full advantage of the characteristics of individual interchangeable lenses, whether wide-angle, telephoto or fisheye, can be recorded for movies that are only possible with a digital-SLR camera. In addition, the camera also offers an AF-F (full-time servo AF) focus mode for movie recording. When AF-F mode is enabled, the camera focuses continuously during movie recording without the need for holding the shutter-release button down halfway. The D3100 also offers in-camera movie editing functions that allow users to save a single frame as a still image or delete unnecessary portions from the beginning or end of movie files.