Sony a9 vs Nikon D850

This is a full comparison between the cameras Sony a9 and Nikon D850. We compare them by looking at the categories you see below.

Sony a9

Nikon D850

Manufacturing

Sony a9 is manufacturered by Sony but Nikon D850 is from Nikon. Both Sony and Nikon are well known brands though.

These two camera models were both released 2017.

Camera	Released
Sony a9	2017
Nikon D850	2017

Type of camera

Sony a9 is a Mirrorless camera while Nikon D850 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 a9	50 mm Full-frame sensor No crop factor/focal length multiplier
Nikon D850	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 a9 has a 24 MP (Megapixels) resolution while Nikon D850 has 46 MP. If we break down this in more detail this is the data behind the numbers:

Camera	Megapixels
Sony a9	24 MP 24000000 pixels 6000 x 4000
Nikon D850	46 MP 45441024 pixels 8256 x 5504

Nikon D850 has a 89 % larger resolution than Sony a9. 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 a9 has a larger ISO-range than Nikon D850. Sony a9 has an ISO range that stretches from 100 to 51200 while Nikon D850 has 64 to 25600.

Camera	ISO Range
Sony a9	100-51200
Nikon D850	64-25600

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 a9
Lens compatibility chart for Nikon D850

Pictures per second

Depending on what you are shooting the FPS, or frames/pictures per second, can definitely be of interest. Sony a9 can shoot up to 20 pictures per seconds and Nikon D850 can shoot up to 9 pictures per seconds.

Camera	FPS (Frames per second)
Sony a9	20
Nikon D850	9

Ability to record movies

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

In this case, both Sony a9 and Nikon D850 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 D850 weighs 1005 gr (equal to 2.22 lb) which is 49% heavier than Sony a9 and its 673 gr (or 1.48 lb).

Camera	Weight
Sony a9	673 gr 1.48 lb
Nikon D850	1005 gr 2.22 lb