Panasonic.Panasonic has delivered 10 mirrorless models, beginning with the Lumix DMC-G1 in 2008. Panasonic has four mirrorless lines: G, GF, GH and GX. The most recent models are the G3, GF3, GH2 and GX1.
The new Lumix DMC-GX1 is the top "flat" model from Panasonic, featuring a very compact body, touch-screen operation and a 16-megapixel sensor with new noise-reduction technology.
The 12.3-megapixel GF3 is the smallest member of Panasonic's G family, with a "flat" design, and actually will fit into a pocket with one of the smaller lenses attached. It offers fast performance and simple operation, including touch-screen AF for still and video shooting.
Panasonic currently offers 14 lenses for its mirrorless cameras, including several with power zooming and near-silent motors designed for video use (but also great for stills). More than half of the lenses have built-in optical stabilizers. The 8mm ƒ/3.5 full-frame fisheye is unique among mirrorless systems.
Accessories include three flash units, a remote shutter, an AC adapter, filters, cases, bags, straps and SD cards. Video accessories include the DMW-MS1 Stereo Microphone and DMW-ZL1 Zoom Lever.
Pentax. Pentax's first (and thus far only) mirrorless model is the tiny Q, by far the smallest mirrorless camera, thanks in large part to its 6.2x4.6mm, 12.4-megapixel backlit CMOS sensor. Nonetheless, it manages to fit in a big 3.0-inch, 460K-dot LCD monitor on the back, a pop-up flash and lots of features.
The body features durable, scratch-resistant magnesium-alloy covers. The camera can shoot 12-bit DNG RAW, as well as JPEG still images and 1920x1080 HD video at 30p. Sensor-shift shake reduction provides stabilization with all lenses.
Pentax offers five lenses for the Q. Each lens contains a shutter, with speeds from 30 to 1?2000 sec., and flash sync at all speeds; there's also an electronic shutter that goes to 1?8000 sec. There are currently no lens adapters for the Q.
The optional accessory Viewfinder O-VF1 provides eye-level viewing (it's a glass optical device, not electronic).