Canon EOS R3 vs Canon EOS 1D Mark IV

This is a full comparison between the cameras Canon EOS R3 and Canon EOS 1D Mark IV. We compare them by looking at the categories you see below.

Manufacturing

These cameras are both manufactured by Canon.

Type of camera

Canon EOS R3 is a Mirrorless camera while Canon EOS 1D Mark IV is a DSLR camera. More information about their differences will come soon.

Sensors / crop factor

These cameras have different sensors. Canon EOS R3 has a "Canon Full Frame"-sensor while Canon EOS 1D Mark IV has a "Canon APS-H"-sensor, and their difference in sensors will also affect the crop factor and experience focal length. See the table below.

** 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)

Resolution

Canon EOS R3 has a 24 MP (Megapixels) resolution while Canon EOS 1D Mark IV has 16,1 MP. If we break down this in more detail this is the data behind the numbers:

Canon EOS R3 has a 50 % larger resolution than Canon EOS 1D Mark IV. 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 1D Mark IV has a larger ISO-range than Canon EOS R3. Canon EOS 1D Mark IV has an ISO range that stretches from 50 to 102400 while Canon EOS R3 has 100 to 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 Canon EOS 1D Mark IV

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 Canon EOS 1D Mark IV can shoot up to 10 pictures per seconds.

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 Canon EOS 1D Mark IV 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 1D Mark IV weighs 1230 gr (equal to 2.71 lb) which is 21% heavier than Canon EOS R3 and its 1015 gr (or 2.24 lb).

Canon EOS R3 vs Canon EOS 1D Mark IV Specs

Below you will find the complete and detailed technical specs for both Canon EOS R3 and Canon EOS 1D Mark IV, 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	Canon EOS 1D Mark IV
Name	Canon EOS R3	Canon EOS 1D Mark IV
Manufacturer	Canon	Canon
Release Date and Price	Canon EOS R3	Canon EOS 1D Mark IV
Release Year	2021	2009
Release Date	2021-04-14	2009-10-20
MSRP	5999 USD	4999 USD
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Camera Type	Canon EOS R3	Canon EOS 1D Mark IV
Camera Type	Mirrorless	DSLR
Sensor	Canon EOS R3	Canon EOS 1D Mark IV
Sensor Size	Full Frame (approx 36 x 24 mm)	APS-H (approx 27.9 x 18.6 mm)
Sensor Type	Stacked CMOS	CMOS
Resolution	6000 x 4000 pixels	4896 x 3264 pixels
Megapixels	24 MP	16,1 MP
Image Processor	DIGIC X	DIGIC 4
Image	Canon EOS R3	Canon EOS 1D Mark IV
ISO Range	100 - 102400	50 - 102400
White Balance Presets	6	8
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	Canon EOS 1D Mark IV
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 Face Detection LiveView
Focus Points	1053	45
Lens Mount	Canon RF See Compatible Lenses	Canon EF 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	APS-H Sensor 1.3x multiplier Example: 24 mm becomes 31 mm 50 mm becomes 65 mm 100 mm becomes 130 mm 200 mm becomes 260 mm
Screen & Viewfinder	Canon EOS R3	Canon EOS 1D Mark IV
Articulated LCD	Fully articulated	Fixed
Screen size	3.2”	3”
Screen dots	4150000	920000
Touch screen	Yes	No
Screen type	TFT LCD	TFT LCD
Live view	Yes	Yes
Viewfinder Type	Electronic	Optical (pentaprism)
Viewfinder Coverage	100%	100%
Viewfinder Magnification	0.76×	0.76× (0.58× 35mm equiv.)
Viewfinder Resolution	5760000	N/A
Photography features	Canon EOS R3	Canon EOS 1D Mark IV
Frames per second	30 fps	10 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)	+/- 3 (at 1/3 EV, 1/2 EV steps)
Videography features	Canon EOS R3	Canon EOS 1D Mark IV
Video recording	Yes	Yes
Video format	MPEG4 H.264 H.265	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	No
Storage	Canon EOS R3	Canon EOS 1D Mark IV
Memory Card	Compact Flash Express SD/SDHC	Compact Flash SD/SDHC
Connectivity	Canon EOS R3	Canon EOS 1D Mark IV
HDMI Output	Yes	Yes
Microphone Port	Yes	Yes
Headphone Port	Yes	No
Wireless	Yes Built-in (802.11ac + Bluetooth)	Yes Optional , Eye-Fi Connected and Wireless File Transmitter WFT-E2
Remote Control	Yes (via smartphone)	Yes (N3 connector)
GPS	Yes Built-in	No
Body & Dimensions	Canon EOS R3	Canon EOS 1D Mark IV
Enviromentally sealed	Yes	Yes
Battery	Built-in	Battery Pack
Battery Details	LP-E19 lithium-ion battery & charger	Lithium-Ion LP-E4 rechargeable battery & charger
Battery Life (CIPA)	760 shots	1500 shots
Width	150 mm	156 mm
Height	143 mm	157 mm
Depth	87 mm	80 mm
Weight	1015 gram	1230 gram