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.

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

Sony a7R IIIA vs Nikon D3x Specs

Below you will find the complete and detailed technical specs for both Sony a7R IIIA and Nikon D3x, next to each other. Each category of data is a link to an article covering the subject, giving you a deeper understanding so you can better understand the strengths and weaknesses of the two camera models.

Product
Sony a7R IIIA
Nikon D3x
Name Sony a7R IIIA Nikon D3x
Manufacturer Sony Nikon
Release Date and Price
Sony a7R IIIA
Nikon D3x
Release Year 2021 2008
Release Date 2021-04-07 2008-12-01
MSRP 3199 USD 7470 USD
Buy it today
Camera Type
Sony a7R IIIA
Nikon D3x
Camera Type Mirrorless DSLR
Sensor
Sony a7R IIIA
Nikon D3x
Sensor Size Full Frame (approx 36 x 24 mm) Full Frame (approx 36 x 23.9 mm)
Also known as "FX"
Sensor Type BSI-CMOS CMOS
Resolution 7952 x 5304 pixels 6048 x 4032 pixels
Megapixels 42 MP 24,5 MP
Image Processor BIONZ X EXPEED
Image
Sony a7R IIIA
Nikon D3x
ISO Range 100 - 32000 100 - 6400
White Balance Presets 10 12
Custom White Balance Yes Yes
Image Stabilization Yes
(Sensor-Shift (5-axis))
No
Image Stabilization CIPA Rating 5.5 stops 0 stops
Uncompressed format RAW RAW + TIFF
Optics & Focus
Sony a7R IIIA
Nikon D3x
Autofocus Motor Yes Yes
Autofocus Contract Detect (sensor)
Phase Detect
Multi Area
Center
Selective Single Point
Tracking
Single
Continuous
Touch
Face Detection
LiveView
Contract Detect (sensor)
Phase Detect
Multi Area
Selective Single Point
Single
Continuous
LiveView
Focus Points 399 51
Lens Mount Sony E

See Compatible Lenses
Nikon F

See Compatible Lenses
Focal Length Multiplier Full frame
No multiplier
Example:
24 mm remains 24 mm
50 mm remains 50 mm
100 mm remains 100 mm
200 mm remains 200 mm
FX (Full frame)
No multiplier
Example:
24 mm remains 24 mm
50 mm remains 50 mm
100 mm remains 100 mm
200 mm remains 200 mm
Screen & Viewfinder
Sony a7R IIIA
Nikon D3x
Articulated LCD Tilting Fixed
Screen size 3” 3”
Screen dots 2360000 920000
Touch screen Yes No
Screen type TFT LCD Super Density TFT color LCD with wide-viewing angle
Live view Yes Yes
Viewfinder Type Electronic Optical (pentaprism)
Viewfinder Coverage 100% 100%
Viewfinder Magnification 0.78x 0.7×
Viewfinder Resolution 3686400 N/A
Photography features
Sony a7R IIIA
Nikon D3x
Frames per second 10 fps 5 fps
Minimum Shutter Speed 30 seconds 30 seconds
Maximum Shutter Speed 1/8000 seconds 1/8000 seconds
Built-in Flash No No
Built-in Flash Range N/A N/A
External Flash Yes Yes
Self-Timer Yes Yes
Time-lapse No Yes
Metering modes Multi
Center Weighted
Spot
Multi
Center Weighted
Spot
Exposure Compensation +/- 5 (at 1/3 EV, 1/2 EV steps) +/- 5 (at 1/3 EV, 1/2 EV, 1 EV steps)
Videography features
Sony a7R IIIA
Nikon D3x
Video recording Yes No
Video format MPEG4
XAVC-S
AVCHD
N/A
Video resolution 1920 x 1080
3840 x 2160
N/A
Built-in Microphone Yes No
Built-in Speakers Yes No
Storage
Sony a7R IIIA
Nikon D3x
Memory Card SD/SDHC
Compact Flash
Connectivity
Sony a7R IIIA
Nikon D3x
HDMI Output Yes Yes
Microphone Port Yes No
Headphone Port Yes No
Wireless Yes
Built-in (802.11b/g/n + NFC + Bluetooth)
No
Remote Control Yes (wired, wireless, smartphone) Yes
GPS No Yes
Optional through GP-1
Body & Dimensions
Sony a7R IIIA
Nikon D3x
Enviromentally sealed Yes Yes
Battery Battery Pack Battery Pack
Battery Details NP-FZ100 lithium-ion battery and charger
Lithium-Ion EN-EL4a rechargeable battery & charger
Battery Life (CIPA) 650 shots 4400 shots
Width 127 mm 160 mm
Height 96 mm 157 mm
Depth 74 mm 88 mm
Weight 657 gram 1260 gram