Canon EOS 5D Mark III vs 6D: 14 key differences explained


Canon EOS 5D Mark III vs 6D: which full-frame DSLR should you choose?

Canon EOS 5D Mark III vs 6D: 09 Movies

Again, these two cameras appear almost identical in their capabilities, but have important differences which aren’t obvious straight away.

Both can shoot full HD 1920 x 1080 video at 30fps, 25fps or 24fps and both have sockets for external microphones.

But the EOS 5D Mark III goes an important step further, adding a headphone socket for monitoring sound levels during recording and offering clean, uncompressed HDMI output for maximum quality. These two features will be especially important for professional videographers.

Canon EOS 5D Mark III vs 6D: 10 Memory

The EOS 5D Mark III has two memory card slots, one for CF cards and one for SD/SDHC/SDXC, but the EOS 6D has just one slot for SD/SDHC/SDXC cards.

The extra card slot makes the EOS 5D Mark III compatible with two memory card formats, but the twin-card setup is useful in other ways. It’s not there simply to increase the memory capacity – you can simply buy larger cards for that. The second card can be used as a backup to ‘mirror’ your shots in a second location as you shoot, or to separate RAW and JPEG files, for example.

Twin card slots aren’t essential, but they can be very useful.

SEE MORE: A beginner’s guide to Canon’s Project1709 platform

Canon EOS 5D Mark III vs 6D: 11 Wi-Fi and GPS

Here, the balance swings in the EOS 6D’s favour. Even though it’s the cheapest by some margin it still has built-in GPS and Wi-Fi. The EOS 5D Mark III does not, so if you want either feature you’ll have to pay extra for an add-on accessory.

Canon EOS 5D Mark III vs 6D: 12 Battery

The EOS 5D Mark III and EOS 6D use the same LP-E6 battery, which gives a good life expectancy of 950 shots in the 5D Mark III, but does even better in the 6D, where it’s capable of recording 1090 shots before it needs recharging.


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  • The Canon 6D has a 3-inch rear LCD screen not 3.2-inch..