Sony a7R IIIA vs Nikon D3x

This is a full comparison between the cameras Sony a7R IIIA and Nikon D3x. We compare them by looking at the categories you see below.

Sony a7R IIIA

Nikon D3x

Manufacturing

Sony a7R IIIA is manufacturered by Sony but Nikon D3x is from Nikon. Both Sony and Nikon are well known brands though.

Sony a7R IIIA were released 2021 and Nikon D3x was released 2008. That is a 13 years difference. In tech, this period can be of interest since technology is always improving, etc.

Camera	Released
Sony a7R IIIA	2021
Nikon D3x	2008

Type of camera

Sony a7R IIIA is a Mirrorless camera while Nikon D3x 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 IIIA	50 mm Full-frame sensor No crop factor/focal length multiplier
Nikon D3x	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 IIIA has a 42 MP (Megapixels) resolution while Nikon D3x has 24,5 MP. If we break down this in more detail this is the data behind the numbers:

Camera	Megapixels
Sony a7R IIIA	42 MP 42177408 pixels 7952 x 5304
Nikon D3x	24,5 MP 24385536 pixels 6048 x 4032

Sony a7R IIIA has a 73 % larger resolution than Nikon D3x. 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 IIIA has a larger ISO-range than Nikon D3x. Sony a7R IIIA has an ISO range that stretches from 100 to 32000 while Nikon D3x has 100 to 6400.

Camera	ISO Range
Sony a7R IIIA	100-32000
Nikon D3x	100-6400

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 IIIA
Lens compatibility chart for Nikon D3x

Pictures per second

Depending on what you are shooting the FPS, or frames/pictures per second, can definitely be of interest. Sony a7R IIIA can shoot up to 10 pictures per seconds and Nikon D3x can shoot up to 5 pictures per seconds.

Camera	FPS (Frames per second)
Sony a7R IIIA	10
Nikon D3x	5

Ability to record movies

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

When comparing these two cameras there is only one of them that can shoot movies and that is Sony a7R IIIA. Unfortunately Nikon D3x does not support recording movies and movie clips.

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 D3x weighs 1260 gr (equal to 2.78 lb) which is 92% heavier than Sony a7R IIIA and its 657 gr (or 1.45 lb).

Camera	Weight
Sony a7R IIIA	657 gr 1.45 lb
Nikon D3x	1260 gr 2.78 lb