Nikon D3100 key features
* 14.2 MP APS-C (DX) sensor — good image quality and detail.
* ISO 100–3200, expandable up to ISO 12,800 — useful in low light.
* 11-point autofocus system — helps with focusing on your subject.
* 3-inch LCD screen — fixed screen, not touchscreen or flip-out.
* Full HD 1080p video — records video at up to 24 fps.
* HDMI output — lets you connect the camera to a TV/monitor.
* Optical viewfinder — traditional DSLR viewfinder.
* Continuous shooting — up to about 3 frames per second.
* Built-in flash — useful for basic indoor photography.
* SD/SDHC/SDXC card storage.
* Nikon F-mount — compatible with many Nikon lenses, although compatibility varies by lens type.
* Battery: EN-EL14 rechargeable lithium-ion battery.