Nikon D3100 Review: Full Review - Video - Digital Cameras, Digital Camera Reviews - The Imaging Reso
Nikon D3100 Video-Mode Focusing The big news with the Nikon D3100's movie mode is that it provides live autofocus during video recording, a first for Nikon's DSLR lineup. Most DSLRs use what's called phase-detect autofocus for their still images. Phase-de...