The 5D Mk III is the older model, introduced in 2012. It's also a fantastic camera, just 1 FPS slower and with slightly lower resolution (there is negligible visible difference between 22MP and 30MP). I'd pick a 5D Mk III over a Nikon D810 any day. The 5D Mark III lacks features like GPS, WiFi and flicker shoot-through, and otherwise takes the It also has a built-in Ethernet port for fast file transfer and remote control. Overall, the Canon EOS 1D X Mark III is an excellent choice for any photographer who wants to shoot smooth 4K videos. 2. Canon EOS 5D Mark IV. I want to upgrade from my rebel T6I crop to a full frame DSLR. I've been eyeing the Canon Mark 5D MK III for awhile now. Would it be a particularly smart choice to upgrade from a newer crop camera I believe not. It can do 1080p 30fps. Magic lantern can technically do it but the cf card controller slows down dramatically when shooting 60fps so in practice no, not really. You can get close though. without magic lantern, no, and i hear that it can be a bit problematic. if you haven’t bought the camera yet or don’t mind selling it to get The camera can also shoot in 4:3 aspect at 2240 x 1680 so one way to get continuous 4K RAW recording out of the 5D Mark III is to cheat. With an anamorphic lens you can keep the vertical resolution at a very nice 1680 pixels, which is a higher vertical resolution than the camera shoots in 3.5K and 4K mode… Available range varies by shooting mode.) Drive System: Drive modes: Single shooting, High-speed continuous shooting, Lowspeed continuous shooting, Silent single shooting, Silent continuous shooting, 10-sec. self-timer/remote control, 2-sec. self-timer/remote control: Continuous shooting speed: High-speed continuous shooting: Max. approx. 6 Built on the success of its predecessor and featuring the most advanced autofocus system Canon has released to date from its EOS-1D X line, the Canon 5D Mark III is a rather promising upgrade to the 5D line. With an enhanced image sensor with ISO 100 to 25,600 native ISO range, fully weather-sealed camera body, 6 fps burst shooting speed and Canon's EOS 5D Mark IV is the long-awaited fourth model in the enormously popular series of full-frame DSLRs. Coming over four years after the previous EOS 5D Mark III, the Mark IV boosts the resolution to 30.4 Megapixels with a new full-frame sensor that supports Dual Pixel CMOS AF for confident refocusing during Live View and movies. vl7ATM.