Canon announced the new 5D MkIII on the 2nd March 2012. This document is to see how well the camera performed in the field and with our inhouse tests.
We looked at the camera’s AF system, how well it tracks and focuses. The ISO, we compared it against the 5D MkII, 7D and 1D MkIV, and lastly the resolution. So let’s look first at the AF system.
Canon has had some bad press about their AF systems in the 1D MkIII, improved with the 7D and 1D MkIV but did not win to many critics over. They really stepped up their game with the 5D MkIII. When you look at the new specification they increased the dual cross AF sensors, they increased the cross type AF points and spread them further out towards the end focusing points and increased the total AF to 61. Now what is important to note here is that the dual cross AF sensors only work with lenses with a maximum aperture of f2.8 and faster. The 41cross type AF sensors work with lenses with a maximum aperture of f4 and faster. If you use a lens with a maximum aperture of f5.6 then you have 21 cross type AF point all grouped in the centre.