Canon EOS R3 vs Nikon D3s

This is a full comparison between the cameras Canon EOS R3 and Nikon D3s. We compare them by looking at the categories you see below.

Manufacturing

Canon EOS R3 is manufacturered by Canon but Nikon D3s is from Nikon. Both Canon and Nikon are well known brands though.

Canon EOS R3 were released 2021 and Nikon D3s was released 2009. That is a 12 years difference. In tech, this period can be of interest since technology is always improving, etc.

Camera Released
Canon EOS R3 2021
Nikon D3s 2009

Type of camera

Canon EOS R3 is a Mirrorless camera while Nikon D3s 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 D3s 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 D3s has 12,1 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 D3s 12,1 MP
12052992 pixels
4256 x 2832

Canon EOS R3 has a 99 % larger resolution than Nikon D3s. 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 D3s. Canon EOS R3 has an ISO range that stretches from 100 to 102400 while Nikon D3s has 200 to 102400.

Camera ISO Range
Canon EOS R3 100-102400
Nikon D3s 200-102400

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 D3s

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 D3s can shoot up to 11 pictures per seconds.

Camera FPS (Frames per second)
Canon EOS R3 30
Nikon D3s 11

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 D3s 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 D3s weighs 1240 gr (equal to 2.73 lb) which is 22% heavier than Canon EOS R3 and its 1015 gr (or 2.24 lb).

Camera Weight
Canon EOS R3 1015 gr
2.24 lb
Nikon D3s 1240 gr
2.73 lb

Canon EOS R3 vs Nikon D3s Specs

Below you will find the complete and detailed technical specs for both Canon EOS R3 and Nikon D3s, 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 D3s
Name Canon EOS R3 Nikon D3s
Manufacturer Canon Nikon
Release Date and Price
Canon EOS R3
Nikon D3s
Release Year 2021 2009
Release Date 2021-04-14 2009-10-14
MSRP 5999 USD 5199 USD
Buy it today
Camera Type
Canon EOS R3
Nikon D3s
Camera Type Mirrorless DSLR
Sensor
Canon EOS R3
Nikon D3s
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 4256 x 2832 pixels
Megapixels 24 MP 12,1 MP
Image Processor DIGIC X EXPEED
Image
Canon EOS R3
Nikon D3s
ISO Range 100 - 102400 200 - 102400
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 + TIFF
Optics & Focus
Canon EOS R3
Nikon D3s
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 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 D3s
Articulated LCD Fully articulated Fixed
Screen size 3.2” 3”
Screen dots 4150000 921000
Touch screen Yes No
Screen type TFT LCD Low-temperature polysilicon TFT color LCD
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 D3s
Frames per second 30 fps 11 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 Yes Yes
Metering modes Multi
Center Weighted
Spot
Partial
Multi
Center Weighted
Spot
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 D3s
Video recording Yes Yes
Video format MPEG4
H.264
H.265
Motion JPEG
MPEG4
H.264
Video resolution 1920 x 1080
3840 x 2160
4096 x 2160
1280 x 720
Built-in Microphone Yes Yes
Built-in Speakers Yes No
Storage
Canon EOS R3
Nikon D3s
Memory Card Compact Flash Express
SD/SDHC
Compact Flash
Connectivity
Canon EOS R3
Nikon D3s
HDMI Output Yes Yes
Microphone Port Yes No
Headphone Port Yes No
Wireless Yes
Built-in (802.11ac + Bluetooth)
Yes
Optional
Remote Control Yes (via smartphone) Yes
GPS Yes
Built-in
Yes
Optional with GP-1
Body & Dimensions
Canon EOS R3
Nikon D3s
Enviromentally sealed Yes Yes
Battery Built-in Battery Pack
Battery Details LP-E19 lithium-ion battery & charger
Lithium-Ion EN-EL4a rechargeable battery & charger
Battery Life (CIPA) 760 shots 4200 shots
Width 150 mm 160 mm
Height 143 mm 157 mm
Depth 87 mm 88 mm
Weight 1015 gram 1240 gram