Canon EOS 1D X Mark III vs Canon EOS 1D Mark IV

This is a full comparison between the cameras Canon EOS 1D X Mark III 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.

Canon EOS 1D X Mark III were released 2020 and Canon EOS 1D Mark IV was released 2009. That is a 11 years difference. In tech, this period can be of interest since technology is always improving, etc.

Camera Released
Canon EOS 1D X Mark III 2020
Canon EOS 1D Mark IV 2009

Type of camera

Both these cameras are DSLR cameras. No difference there.

Sensors / crop factor

These cameras have different sensors. Canon EOS 1D X Mark III 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.

Camera Focal length, 50mm f/1.8 **
Canon EOS 1D X Mark III 50 mm
Full-frame sensor
No crop factor/focal length multiplier
Canon EOS 1D Mark IV 65 mm
Canon APS-H sensor
Crop factor/focal length multiplier by * 1.3

** 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 1D X Mark III has a 20 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:

Camera Megapixels
Canon EOS 1D X Mark III 20 MP
19961856 pixels
5472 x 3648
Canon EOS 1D Mark IV 16,1 MP
15980544 pixels
4896 x 3264

Canon EOS 1D X Mark III has a 25 % 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 1D X Mark III. Canon EOS 1D Mark IV has an ISO range that stretches from 50 to 102400 while Canon EOS 1D X Mark III has 100 to 102400.

Camera ISO Range
Canon EOS 1D X Mark III 100-102400
Canon EOS 1D Mark IV 50-102400

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.

Here is a complete overview of which lenses work with each camera:
Lens compatibility chart for Canon EOS 1D X Mark III
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 1D X Mark III can shoot up to 20 pictures per seconds and Canon EOS 1D Mark IV can shoot up to 10 pictures per seconds.

Camera FPS (Frames per second)
Canon EOS 1D X Mark III 20
Canon EOS 1D Mark IV 10

Ability to record movies

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

In this case, both Canon EOS 1D X Mark III 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 X Mark III weighs 1440 gr (equal to 3.17 lb) which is 17% heavier than Canon EOS 1D Mark IV and its 1230 gr (or 2.71 lb).

Camera Weight
Canon EOS 1D X Mark III 1440 gr
3.17 lb
Canon EOS 1D Mark IV 1230 gr
2.71 lb

Canon EOS 1D X Mark III vs Canon EOS 1D Mark IV Specs

Below you will find the complete and detailed technical specs for both Canon EOS 1D X Mark III 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 1D X Mark III
Canon EOS 1D Mark IV
Name Canon EOS 1D X Mark III Canon EOS 1D Mark IV
Manufacturer Canon Canon
Release Date and Price
Canon EOS 1D X Mark III
Canon EOS 1D Mark IV
Release Year 2020 2009
Release Date 2020-01-07 2009-10-20
MSRP 6499 USD 4999 USD
Buy it today
Camera Type
Canon EOS 1D X Mark III
Canon EOS 1D Mark IV
Camera Type DSLR DSLR
Sensor
Canon EOS 1D X Mark III
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 CMOS CMOS
Resolution 5472 x 3648 pixels 4896 x 3264 pixels
Megapixels 20 MP 16,1 MP
Image Processor DIGIC X DIGIC 4
Image
Canon EOS 1D X Mark III
Canon EOS 1D Mark IV
ISO Range 100 - 102400 50 - 102400
White Balance Presets 7 8
Custom White Balance Yes Yes
Image Stabilization No No
Image Stabilization CIPA Rating 0 stops 0 stops
Uncompressed format RAW RAW
Optics & Focus
Canon EOS 1D X Mark III
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 191 45
Lens Mount Canon EF

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 1D X Mark III
Canon EOS 1D Mark IV
Articulated LCD Fixed Fixed
Screen size 3.2” 3”
Screen dots 2100000 920000
Touch screen Yes No
Screen type TFT LCD TFT LCD
Live view Yes Yes
Viewfinder Type Optical (pentaprism) Optical (pentaprism)
Viewfinder Coverage 100% 100%
Viewfinder Magnification 0.76× 0.76× (0.58× 35mm equiv.)
Viewfinder Resolution 0 N/A
Photography features
Canon EOS 1D X Mark III
Canon EOS 1D Mark IV
Frames per second 20 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 +/- 5 (at 1/3 EV, 1/2 EV steps) +/- 3 (at 1/3 EV, 1/2 EV steps)
Videography features
Canon EOS 1D X Mark III
Canon EOS 1D Mark IV
Video recording Yes Yes
Video format MPEG4
H.264
H.265
H.264
Video resolution 1280 x 720
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 1D X Mark III
Canon EOS 1D Mark IV
Memory Card Compact Flash Express
Compact Flash
SD/SDHC
Connectivity
Canon EOS 1D X Mark III
Canon EOS 1D Mark IV
HDMI Output Yes Yes
Microphone Port Yes Yes
Headphone Port Yes No
Wireless Yes
Built-in (Wireless LAN (IEEE802.11b/g/n) (2.4 GHz only), with Bluetooth support)
Yes
Optional , Eye-Fi Connected and Wireless File Transmitter WFT-E2
Remote Control Remote control with N3 type contact Yes (N3 connector)
GPS Yes
Built-in
No
Body & Dimensions
Canon EOS 1D X Mark III
Canon EOS 1D Mark IV
Enviromentally sealed Yes Yes
Battery Battery Pack Battery Pack
Battery Details LP-E19 lithium-ion battery & dual charger
Lithium-Ion LP-E4 rechargeable battery & charger
Battery Life (CIPA) 2850 shots 1500 shots
Width 158 mm 156 mm
Height 168 mm 157 mm
Depth 83 mm 80 mm
Weight 1440 gram 1230 gram