Panasonic took an uncommon turn in its pro video cam lineup tonight by launching the first-ever Micro Four Thirds camcorder. The AG-AF100 uses the mirrorless capturing but SLR-sized sensor to shoot 1080p30 video with the same depth of field and wide angles as a 35mm film camera but in a much smaller size than either film or most digital cameras. Choosing MFT provides an extra perk for optics: movie makers still have the option of interchangeable lenses, including adapters to use lenses from Leica or even rivals like Canon and Nikon.