When comparing Canon EOS 5D Mark III vs Nikon D810, the Slant community recommends Nikon D810 for most people. In the question“What are the best full frame DSLR cameras?” Nikon D810 is ranked 1st while Canon EOS 5D Mark III is ranked 6th. The most important reason people chose Nikon D810 is:
It's fast and decisive both in good light and in low light. It accurately recognizes faces and focuses on the nearest eye.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Good autofocus system
61-point autofocus system with 41 cross-type points that performs well in low light.
Pro Complete manual control for video
Shutter, aperture and ISO can be set manually for video.
Pro Excellent ergonomics
Pro Excellent build quality
Pro Great autofocus
It's fast and decisive both in good light and in low light. It accurately recognizes faces and focuses on the nearest eye.
Pro Flat color profile for video
A flat color profile captures footage in low contrast and higher dynamic range allowing for easier color grading in post-production.
Pro Quiet
Cons
Con The camera is showing its age
5D Mark III was released in 2012.
Con Dynamic range could be better
5D Mark III has 11.7 stops of dynamic range while competitors have around 14 stops. And shadow recovery is lacking as well limiting HDR photos further.
Con AF point coverage is restricting
Layout of AF points restricts to compose shots in a certain way.
Con Lacks continuous AF in movie mode
Con Lacks programmable Auto ISO
Con Can't set arbitrary exposure time
Con AF points don't illuminate in Servo mode
It can be difficult to see AF points in low light as they do not illuminate in Servo mode.
Con Autofocus subject tracking could be better
Con Settings banks don't save all settings
Certain settings including AF and Advance modes can't be saved to settings banks and thus can't be recalled.
Con Lacks peaking for video
Focus peaking is not present in D810.