Canon EOS R vs. Canon EOS 5D Mark III

Comparison

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EOS R image
vs
EOS 5D Mark III image
Canon EOS R Canon EOS 5D Mark III
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Megapixels
30.30
22.30
Max. image resolution
6720 x 4480
5760 x 3840

Sensor

Sensor type
CMOS
CMOS
Sensor size
36 x 24 mm
36 x 24 mm
Sensor resolution
6741 x 4494
5784 x 3856
Diagonal
43.27 mm
43.27 mm
Sensor size comparison
Sensor size is generally a good indicator of the quality of the camera. Sensors can vary greatly in size. As a general rule, the bigger the sensor, the better the image quality.

Bigger sensors are more effective because they have more surface area to capture light. An important factor when comparing digital cameras is also camera generation. Generally, newer sensors will outperform the older.

Learn more about sensor sizes »

Actual sensor size

Note: Actual size is set to screen → change »
vs
1 : 1
(ratio)
Canon EOS R Canon EOS 5D Mark III
Surface area:
864.00 mm² vs 864.00 mm²
Difference: 0 mm² (0%)
R and 5D Mark III sensors are the same size.
Note: You are comparing sensors of very different generations. There is a gap of 6 years between Canon R (2018) and Canon 5D Mark III (2012). Six years is a lot of time in terms of technology, meaning newer sensors are overall much more efficient than the older ones.
Pixel pitch
5.34 µm
6.22 µm
Pixel pitch tells you the distance from the center of one pixel (photosite) to the center of the next. It tells you how close the pixels are to each other.

The bigger the pixel pitch, the further apart they are and the bigger each pixel is. Bigger pixels tend to have better signal to noise ratio and greater dynamic range.
Difference: 0.88 µm (16%)
Pixel pitch of 5D Mark III is approx. 16% higher than pixel pitch of R.
Pixel area
28.52 µm²
38.69 µm²
Pixel or photosite area affects how much light per pixel can be gathered. The larger it is the more light can be collected by a single pixel.

Larger pixels have the potential to collect more photons, resulting in greater dynamic range, while smaller pixels provide higher resolutions (more detail) for a given sensor size.
Relative pixel sizes:
vs
Pixel area difference: 10.17 µm² (36%)
A pixel on Canon 5D Mark III sensor is approx. 36% bigger than a pixel on Canon R.
Pixel density
3.51 MP/cm²
2.58 MP/cm²
Pixel density tells you how many million pixels fit or would fit in one square cm of the sensor.

Higher pixel density means smaller pixels and lower pixel density means larger pixels.
Difference: 0.93 µm (36%)
Canon R has approx. 36% higher pixel density than Canon 5D Mark III.
To learn about the accuracy of these numbers, click here.

Specs

Canon R
Canon 5D Mark III
Crop factor
1
1
Total megapixels
31.70
23.38
Effective megapixels
30.30
22.30
Optical zoom
Digital zoom
No
ISO sensitivity
Auto, 100-40000 (extends to 50-102400)
Auto, 100 - 25600 in 1/3 stops, plus 50, 51200, 102400 as option
RAW
Manual focus
Normal focus range
Macro focus range
Focal length (35mm equiv.)
Aperture priority
Yes
Yes
Max. aperture
Max. aperture (35mm equiv.)
n/a
n/a
Metering
Multi, Center-weighted, Spot, Partial
Multi, Center-weighted, Spot, Partial
Exposure compensation
±3 EV (in 1/3 EV, 1/2 EV steps)
±5 EV (in 1/3 EV, 1/2 EV steps)
Shutter priority
Yes
Yes
Min. shutter speed
30 sec
30 sec
Max. shutter speed
1/8000 sec
1/8000 sec
Built-in flash
External flash
Viewfinder
Electronic
Optical (pentaprism)
White balance presets
6
6
Screen size
3.2"
3.2"
Screen resolution
2,100,000 dots
1,040,000 dots
Video capture
Max. video resolution
3840x2160 (30p/25p/24p)
1920x1080 (30p/25p/24p)
Storage types
SD/SDHC/SDXC
Compact Flash Type I (UDMA compatible), SD/SDHC/SDXC
USB
USB 3.0 (5 GBit/sec)
USB 2.0 (480 Mbit/sec)
HDMI
Wireless
GPS
Battery
LP-E6N lithium-ion battery
Lithium-Ion LP-E6 rechargeable battery
Weight
660 g
950 g
Dimensions
135.8 x 98.3 x 84.4 mm
152 x 116 x 76 mm
Year
2018
2012



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Diagonal

Diagonal is calculated by the use of Pythagorean theorem:
Diagonal =  w² + h²
where w = sensor width and h = sensor height

Canon R diagonal

w = 36.00 mm
h = 24.00 mm
Diagonal =  36.00² + 24.00²   = 43.27 mm

Canon 5D Mark III diagonal

w = 36.00 mm
h = 24.00 mm
Diagonal =  36.00² + 24.00²   = 43.27 mm


Surface area

Surface area is calculated by multiplying the width and the height of a sensor.

R sensor area

Width = 36.00 mm
Height = 24.00 mm

Surface area = 36.00 × 24.00 = 864.00 mm²

5D Mark III sensor area

Width = 36.00 mm
Height = 24.00 mm

Surface area = 36.00 × 24.00 = 864.00 mm²


Pixel pitch

Pixel pitch is the distance from the center of one pixel to the center of the next measured in micrometers (µm). It can be calculated with the following formula:
Pixel pitch =   sensor width in mm  × 1000
sensor resolution width in pixels

R pixel pitch

Sensor width = 36.00 mm
Sensor resolution width = 6741 pixels
Pixel pitch =   36.00  × 1000  = 5.34 µm
6741

5D Mark III pixel pitch

Sensor width = 36.00 mm
Sensor resolution width = 5784 pixels
Pixel pitch =   36.00  × 1000  = 6.22 µm
5784


Pixel area

The area of one pixel can be calculated by simply squaring the pixel pitch:
Pixel area = pixel pitch²

You could also divide sensor surface area with effective megapixels:
Pixel area =   sensor surface area in mm²
effective megapixels

R pixel area

Pixel pitch = 5.34 µm

Pixel area = 5.34² = 28.52 µm²

5D Mark III pixel area

Pixel pitch = 6.22 µm

Pixel area = 6.22² = 38.69 µm²


Pixel density

Pixel density can be calculated with the following formula:
Pixel density =  ( sensor resolution width in pixels )² / 1000000
sensor width in cm

One could also use this formula:
Pixel density =   effective megapixels × 1000000  / 10000
sensor surface area in mm²

R pixel density

Sensor resolution width = 6741 pixels
Sensor width = 3.6 cm

Pixel density = (6741 / 3.6)² / 1000000 = 3.51 MP/cm²

5D Mark III pixel density

Sensor resolution width = 5784 pixels
Sensor width = 3.6 cm

Pixel density = (5784 / 3.6)² / 1000000 = 2.58 MP/cm²


Sensor resolution

Sensor resolution is calculated from sensor size and effective megapixels. It's slightly higher than maximum (not interpolated) image resolution which is usually stated on camera specifications. Sensor resolution is used in pixel pitch, pixel area, and pixel density formula. For sake of simplicity, we're going to calculate it in 3 stages.

1. First we need to find the ratio between horizontal and vertical length by dividing the former with the latter (aspect ratio). It's usually 1.33 (4:3) or 1.5 (3:2), but not always.

2. With the ratio (r) known we can calculate the X from the formula below, where X is a vertical number of pixels:
(X × r) × X = effective megapixels × 1000000    →   
X =  effective megapixels × 1000000
r
3. To get sensor resolution we then multiply X with the corresponding ratio:

Resolution horizontal: X × r
Resolution vertical: X

R sensor resolution

Sensor width = 36.00 mm
Sensor height = 24.00 mm
Effective megapixels = 30.30
r = 36.00/24.00 = 1.5
X =  30.30 × 1000000  = 4494
1.5
Resolution horizontal: X × r = 4494 × 1.5 = 6741
Resolution vertical: X = 4494

Sensor resolution = 6741 x 4494

5D Mark III sensor resolution

Sensor width = 36.00 mm
Sensor height = 24.00 mm
Effective megapixels = 22.30
r = 36.00/24.00 = 1.5
X =  22.30 × 1000000  = 3856
1.5
Resolution horizontal: X × r = 3856 × 1.5 = 5784
Resolution vertical: X = 3856

Sensor resolution = 5784 x 3856


Crop factor

Crop factor or focal length multiplier is calculated by dividing the diagonal of 35 mm film (43.27 mm) with the diagonal of the sensor.
Crop factor =   43.27 mm
sensor diagonal in mm


R crop factor

Sensor diagonal in mm = 43.27 mm
Crop factor =   43.27  = 1
43.27

5D Mark III crop factor

Sensor diagonal in mm = 43.27 mm
Crop factor =   43.27  = 1
43.27

35 mm equivalent aperture

Equivalent aperture (in 135 film terms) is calculated by multiplying lens aperture with crop factor (a.k.a. focal length multiplier).

R equivalent aperture

Aperture is a lens characteristic, so it's calculated only for fixed lens cameras. If you want to know the equivalent aperture for Canon R, take the aperture of the lens you're using and multiply it with crop factor.

Since crop factor for Canon R is 1, the equivalent aperture is aperture.

5D Mark III equivalent aperture

Aperture is a lens characteristic, so it's calculated only for fixed lens cameras. If you want to know the equivalent aperture for Canon 5D Mark III, take the aperture of the lens you're using and multiply it with crop factor.

Since crop factor for Canon 5D Mark III is 1, the equivalent aperture is aperture.

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