![autofocus 5d mark iii vs 6d m2 autofocus 5d mark iii vs 6d m2](https://www.trustedreviews.com/wp-content/uploads/sites/54/2017/07/MT2_3799-1024x683.jpg)
![autofocus 5d mark iii vs 6d m2 autofocus 5d mark iii vs 6d m2](https://dustinabbott.net/wp-content/gallery/canon-eos-6d-mark-ii-review/thumbs/thumbs_Canon-80D-AF-coverage-graphic.jpg)
![autofocus 5d mark iii vs 6d m2 autofocus 5d mark iii vs 6d m2](https://martinbaileyphotography.com/wp-content/uploads/2012/03/MBP_5D_MarkIII_20120325_7160-805x536.jpg)
With up 41 cross-type AF points available (shown in red), it is far more likely you will find one to cover the model’s eye. With the EOS 5D Mark III the story changes. You have to use one of the less sensitive, and therefore less accurate, AF points at the edge of the array. As the only cross-type AF point is in the centre, you can’t use it to focus unless the model’s eye is also in the centre of the frame. The single cross-type AF point in the centre is shown in green, and the AF point the photographer would have to use is in red: The photo below shows how this works by overlaying a diagram of the EOS 6D’s AF array over a portrait. The normal way to focus in this situation is to use the AF point closest to the model’s eye. Accurate focus is critical as depth-of-field is very narrow at this setting – you may have less than an inch of sharpness to play with. Imagine that you’re taking a portrait of someone with an 85mm lens set to f1.8. between f1.0 and f2.8) as depth-of-field is so narrow at these settings.Īs an example, let’s look at how it works with portrait photography.
![autofocus 5d mark iii vs 6d m2 autofocus 5d mark iii vs 6d m2](https://nofilmschool.com/sites/default/files/styles/facebook/public/uploads/2012/12/5D3-5D2-6D-Planet5D-Comparison.jpg)
This is especially important if you work at wide apertures (i.e.