Sony a7R vs Nikon D810A

This is a full comparison between the cameras Sony a7R and Nikon D810A. We compare them by looking at the categories you see below.

Sony a7R

Nikon D810A

Manufacturing

Sony a7R is manufacturered by Sony but Nikon D810A is from Nikon. Both Sony and Nikon are well known brands though.

Sony a7R were released 2013 and Nikon D810A was released 2015. That is a 2 years difference. In tech, this period can be of interest since technology is always improving, etc.

Camera	Released
Sony a7R	2013
Nikon D810A	2015

Type of camera

Sony a7R is a Mirrorless camera while Nikon D810A 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	50 mm Full-frame sensor No crop factor/focal length multiplier
Nikon D810A	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

Both these cameras have the exact same resolution. Sony a7R has a 36 MP (Megapixels) resolution while Nikon D810A has 36 MP. If we break down this in more detail this is the data behind the numbers:

Camera	Megapixels
Sony a7R	36 MP 36152320 pixels 7360 x 4912
Nikon D810A	36 MP 36152320 pixels 7360 x 4912

ISO range

Sony a7R has a larger ISO-range than Nikon D810A. Sony a7R has an ISO range that stretches from 100 to 25600 while Nikon D810A has 200 to 12800.

Camera	ISO Range
Sony a7R	100-25600
Nikon D810A	200-12800

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
Lens compatibility chart for Nikon D810A

Pictures per second

Depending on what you are shooting the FPS, or frames/pictures per second, can definitely be of interest. Sony a7R can shoot up to 4 pictures per seconds and Nikon D810A can shoot up to 5 pictures per seconds.

Camera	FPS (Frames per second)
Sony a7R	4
Nikon D810A	5

Ability to record movies

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

In this case, both Sony a7R and Nikon D810A 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 D810A weighs 880 gr (equal to 1.94 lb) which is 89% heavier than Sony a7R and its 465 gr (or 1.03 lb).

Camera	Weight
Sony a7R	465 gr 1.03 lb
Nikon D810A	880 gr 1.94 lb