Sensor size (mm) 24 x 36 : Color filter array: RGB : Pixel pitch (µm) Bits per pixel: 14.0: Canon EOS 5D Mark III Panasonic Lumix DC-S1R The Canon 5D enjoys external dimensions of 152mm x 113mm x 75mm (6.0" x 4.4" x 3.0") along with a weight of 895 grams (1.97 lbs) whilst the Pentax K-3 III has specifications of 135mm x 104mm x 74mm (5.3" x 4.1" x 2.9") with a weight of 820 grams (1.81 lbs). See the Canon 5D vs Pentax K-3 III in our brand new Camera plus Lens Size Comparison Tool. The smaller file size also allows quicker read/write speeds. supports a remote smartphone. Canon EOS 50D. Canon EOS 5D Mark III. This technology allows the users to use their smartphone as a remote control for the device. has an HDMI output. Canon EOS 50D. has a socket for a 3.5 mm audio jack. Canon EOS 5D Mark III. Canon EOS 800D. With a standard mini jack socket, you can use the device with most headphones. has a stereo microphone. Canon EOS 5D Mark III. Canon EOS 800D. A stereo microphone allows to record audio files or movies in stereo without an external microphone. Pixel area difference: 21.96 µm² (131%) A pixel on Canon 5D Mark III sensor is approx. 131% bigger than a pixel on Canon 70D. Pixel density. 2.58 MP/cm². 5.99 MP/cm². Difference: 3.41 µm (132%) Canon 70D has approx. 132% higher pixel density than Canon 5D Mark III. iROSL.