Unlike professional models, the D3100 doesn’t require intimate knowledge of shutter speed or aperture – it can be operated just like a point-and-shoot, with a wealth of automatic modes for casual shooters. But the camera’s real strength lies in its ability to teach, and can introduce those more advanced SLR concepts without making the user feel overwhelmed.
The D3100’s biggest addition is its ability to shoot high-definition movies in 1080p, making it one of the cheapest, video-capable DSLRs on the market. Unlike some other models, the lens will auto-focus while shooting – albeit slowly – and video quality is reasonable under most conditions. However, it’s probably wise to keep this thing away from low-light settings unless you’re using a better lens; the included 18-55mm kit only has an aperture of 4–5.5, which means that grain-inducing ISO must be used to capture dimly-lit scenes.