Canon EOS R3 vs Nikon D800

This is a full comparison between the cameras Canon EOS R3 and Nikon D800. We compare them by looking at the categories you see below.

Manufacturing

Canon EOS R3 is manufacturered by Canon but Nikon D800 is from Nikon. Both Canon and Nikon are well known brands though.

Canon EOS R3 were released 2021 and Nikon D800 was released 2012. That is a 9 years difference. In tech, this period can be of interest since technology is always improving, etc.

Camera Released
Canon EOS R3 2021
Nikon D800 2012

Type of camera

Canon EOS R3 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 **
Canon EOS R3 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 (Canon)
Camera selection can affect the focal length (Nikon)

Resolution

Canon EOS R3 has a 24 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
Canon EOS R3 24 MP
24000000 pixels
6000 x 4000
Nikon D800 36,3 MP
36152320 pixels
7360 x 4912

Nikon D800 has a 51 % larger resolution than Canon EOS R3. 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

Canon EOS R3 has a larger ISO-range than Nikon D800. Canon EOS R3 has an ISO range that stretches from 100 to 102400 while Nikon D800 has 100 to 25600.

Camera ISO Range
Canon EOS R3 100-102400
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.

Worth mentioning is that Canon EOS R3 belongs to the Canon EOS R-system and needs an adapter to work with Canons EF, EF-S, MP-E, and TS-E lenses. You can read more about this adapter here:
Canon Lens Mount Adapter EF-EOS R

Here is a complete overview of which lenses work with each camera:
Lens compatibility chart for Canon EOS R3
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. Canon EOS R3 can shoot up to 30 pictures per seconds and Nikon D800 can shoot up to 6 pictures per seconds.

Camera FPS (Frames per second)
Canon EOS R3 30
Nikon D800 6

Ability to record movies

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

In this case, both Canon EOS R3 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.

Canon EOS R3 weighs 1015 gr (equal to 2.24 lb) which is 13% heavier than Nikon D800 and its 900 gr (or 1.98 lb).

Camera Weight
Canon EOS R3 1015 gr
2.24 lb
Nikon D800 900 gr
1.98 lb

Canon EOS R3 vs Nikon D800 Specs

Below you will find the complete and detailed technical specs for both Canon EOS R3 and Nikon D800, 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
Canon EOS R3
Nikon D800
Name Canon EOS R3 Nikon D800
Manufacturer Canon Nikon
Release Date and Price
Canon EOS R3
Nikon D800
Release Year 2021 2012
Release Date 2021-04-14 2012-02-07
MSRP 5999 USD 2999 USD
Buy it today
Camera Type
Canon EOS R3
Nikon D800
Camera Type Mirrorless DSLR
Sensor
Canon EOS R3
Nikon D800
Sensor Size Full Frame (approx 36 x 24 mm) Full Frame (approx 36 x 23.9 mm)
Also known as "FX"
Sensor Type Stacked CMOS CMOS
Resolution 6000 x 4000 pixels 7360 x 4912 pixels
Megapixels 24 MP 36,3 MP
Image Processor DIGIC X EXPEED 3
Image
Canon EOS R3
Nikon D800
ISO Range 100 - 102400 100 - 25600
White Balance Presets 6 12
Custom White Balance No Yes
Image Stabilization Yes
(Sensor-Shift)
No
Image Stabilization CIPA Rating 0 stops 0 stops
Uncompressed format RAW RAW
Optics & Focus
Canon EOS R3
Nikon D800
Autofocus Motor Yes Yes
Autofocus Contract Detect (sensor)
Phase Detect
Multi Area
Center
Selective Single Point
Tracking
Single
Continuous
Touch
Face Detection
LiveView
Phase Detect
Multi Area
Selective Single Point
Tracking
Single
Continuous
Face Detection
LiveView
Focus Points 1053 51
Lens Mount Canon RF

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
Canon EOS R3
Nikon D800
Articulated LCD Fully articulated Fixed
Screen size 3.2” 3,2”
Screen dots 4150000 921000
Touch screen Yes No
Screen type TFT LCD TFT Color LCD with 170 degrees wide-viewing angle
Live view Yes Yes
Viewfinder Type Electronic Optical (pentaprism)
Viewfinder Coverage 100% 100%
Viewfinder Magnification 0.76× 0.7×
Viewfinder Resolution 5760000 N/A
Photography features
Canon EOS R3
Nikon D800
Frames per second 30 fps 6 fps
Minimum Shutter Speed 30 seconds 30 seconds
Maximum Shutter Speed 1/8000 seconds 1/8000 seconds
Built-in Flash No Yes
Built-in Flash Range N/A 12 meters
External Flash Yes Yes
Self-Timer Yes Yes
Time-lapse Yes Yes
Metering modes Multi
Center Weighted
Spot
Partial
Multi
Center Weighted
Spot
Average
Exposure Compensation +/- 3 (at 1/3 EV, 1/2 EV steps) +/- 5 (at 1/3 EV, 1/2 EV, 1 EV steps)
Videography features
Canon EOS R3
Nikon D800
Video recording Yes Yes
Video format MPEG4
H.264
H.265
MPEG4
H.264
Video resolution 1920 x 1080
3840 x 2160
4096 x 2160
1280 x 720
1920 x 1080
Built-in Microphone Yes Yes
Built-in Speakers Yes Yes
Storage
Canon EOS R3
Nikon D800
Memory Card Compact Flash Express
SD/SDHC
Compact Flash
Connectivity
Canon EOS R3
Nikon D800
HDMI Output Yes Yes
Microphone Port Yes Yes
Headphone Port Yes Yes
Wireless Yes
Built-in (802.11ac + Bluetooth)
Yes
Optional with Nikon Wireless Transmitter for D800 (WT-4A)
Remote Control Yes (via smartphone) Yes (Optional, wired or wireless)
GPS Yes
Built-in
Yes
Optional with GP-1
Body & Dimensions
Canon EOS R3
Nikon D800
Enviromentally sealed Yes Yes
Battery Built-in Battery Pack
Battery Details LP-E19 lithium-ion battery & charger
Lithium-Ion EN-EL15 rechargeable battery & charger
Battery Life (CIPA) 760 shots 900 shots
Width 150 mm 146 mm
Height 143 mm 123 mm
Depth 87 mm 82 mm
Weight 1015 gram 900 gram