The D3100 is built around a 14.2 megapixel CMOS sensor, bringing not only live view but also Full HD video capture to Nikon’s entry-level model for the first time. In fact, this made it the first Nikon DSLR to offer 1920×1080 movie recording. It can only record clips up to about ten minutes long (due to a 4Gb maximum file size limitation shared by all DSLRs), but this still counts as an impressive feature addition at this level.
The body gets a slight refresh from a basic design that essentially dates back four years to the D40, gaining an extra button to the left of the screen, a drive mode switch at the base of the mode dial, a sprung lever to engage live view and a direct record movie button. Revisions have also been made to the feature-teaching, hand-holding ‘Guide Mode’, and an additional autofocus mode that’s designed to allow better focusing in live view and autofocus during video shooting.
Nikon D3100 Key Features
* 14.2 megapixel DX-format CMOS sensor
* 3.0″ LCD monitor (230,000 dots)
* Image sensor cleaning (sensor shake)
* 11 AF points (with 3D tracking)
* IS0 100-3200 range (12,800 expanded)
* HD movies (1080p, 720p or WVGA)
Nikon D3100 vs D3000: Key Differences
The D3100 substantially refreshes the D3000, taking a rather outdated-looking specification and turning it into one of the most competitive in its sector.
* Higher resolution sensor (14.2MP vs. 10MP)
* Ability to shoot Raw + Fine JPEG
* Socket for connecting Nikon GP1 GPS unit
* Optional wired remote via GPS socket
* No wireless remote option
* Live view
* 1080p HD movies
* HDMI output
* Wider ISO range
* Full-time AF mode (AF-F in live view)
* Revised focus screen (different AF point illumination)
Download free User’s Manual – D3100 – Guide to Digital Photography : Click Here