Sony a7R III vs Nikon D800

This is a full comparison between the cameras Sony a7R III and Nikon D800. We compare them by looking at the categories you see below.

Sony a7R III

Nikon D800

Manufacturing

Sony a7R III is manufacturered by Sony but Nikon D800 is from Nikon. Both Sony and Nikon are well known brands though.

Sony a7R III were released 2017 and Nikon D800 was released 2012. That is a 5 years difference. In tech, this period can be of interest since technology is always improving, etc.

Camera	Released
Sony a7R III	2017
Nikon D800	2012

Type of camera

Sony a7R III is a Mirrorless camera while Nikon D800 is a DSLR camera. More information about their differences will come soon.

Sensors / crop factor

Even though the camera sensors might be called differently they are both considered Full frame which means that the focal length of the lenses is not affected. There is no crop factor on any of these cameras and sensors.

Camera	Focal length, 50mm f/1.8 **
Sony a7R III	50 mm Full-frame sensor No crop factor/focal length multiplier
Nikon D800	50 mm Full-frame sensor No crop factor/focal length multiplier

** Experienced focal length when using a lens such as a common "50mm f/1.8"

Learn more about crop factor and focal length multiplier here:
Camera selection can affect the focal length (Sony)
Camera selection can affect the focal length (Nikon)

Resolution

Sony a7R III has a 42 MP (Megapixels) resolution while Nikon D800 has 36,3 MP. If we break down this in more detail this is the data behind the numbers:

Camera	Megapixels
Sony a7R III	42 MP 42177408 pixels 7952 x 5304
Nikon D800	36,3 MP 36152320 pixels 7360 x 4912

Sony a7R III has a 17 % larger resolution than Nikon D800. This could give you more details in the picture but also a possibility to crop more in the pictures, afterward while editing the pictures, if needed that is.

ISO range

Sony a7R III has a larger ISO-range than Nikon D800. Sony a7R III has an ISO range that stretches from 100 to 32000 while Nikon D800 has 100 to 25600.

Camera	ISO Range
Sony a7R III	100-32000
Nikon D800	100-25600

Autofocus and lens compatibility

Both of these cameras have a built-in autofocus motor. Some lenses, that support autofocus, do not have an autofocus motor of their own but this won't cause any problems with these two cameras.

Here is a complete overview of which lenses work with each camera:
Lens compatibility chart for Sony a7R III
Lens compatibility chart for Nikon D800

Pictures per second

Depending on what you are shooting the FPS, or frames/pictures per second, can definitely be of interest. Sony a7R III can shoot up to 10 pictures per seconds and Nikon D800 can shoot up to 6 pictures per seconds.

Camera	FPS (Frames per second)
Sony a7R III	10
Nikon D800	6

Ability to record movies

It is becoming more and more popular to record movies with digital cameras.

In this case, both Sony a7R III and Nikon D800 can shoot movies.

Weight

The weight of the camera can be an extremely important factor, especially if the camera is about to be used, or carried around, for several hours at a time.

Nikon D800 weighs 900 gr (equal to 1.98 lb) which is 37% heavier than Sony a7R III and its 657 gr (or 1.45 lb).

Camera	Weight
Sony a7R III	657 gr 1.45 lb
Nikon D800	900 gr 1.98 lb