Canon EOS 90D vs Canon EOS R Comparison

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EOS 90D image
vs
EOS R image
Canon EOS 90D Canon EOS R
Megapixels
32.50
30.30
Image resolution
6960 x 4640
6720 x 4480

Sensor

Sensor type
CMOS
CMOS
Sensor size
22.3 x 14.9 mm
36 x 24 mm
Sensor resolution
6983 x 4655
6741 x 4494
Diagonal
26.82 mm
43.27 mm
Compare sensor size:

Sensor Size

Actual size is set to screen
vs
1:2.6
(ratio)
Canon EOS 90D Canon EOS R
Surface area:
332.27 mm² vs 864.00 mm²
Difference: 531.73 mm² (160%)
R sensor is ~2.6x bigger than 90D's.
Pixel pitch
3.19 µm
5.34 µm
Difference: 2.15 µm (67%)
Pixel pitch of R is ~67% higher than 90D's.
Pixel area
10.18 µm²
28.52 µm²
Relative pixel sizes:
vs
Pixel area difference: 18.34 µm² (180%)
Pixel on Canon R sensor is ~180% bigger than Canon 90D's.
Pixel density
9.81 MP/cm²
3.51 MP/cm²
Difference: 6.3 µm (179%)
Canon 90D has ~179% higher pixel density than Canon R's.

Specs

Canon 90D
Canon R
Crop factor
1.61
1
Megapixels
34.40
31.70
Optical zoom
n/a
Digital zoom
n/a
ISO range
Auto, 100-25600 (expands to 51200)
Auto, 100-40000 (extends to 50-102400)
RAW support
Manual focus
Focus range
n/a
Macro focus range
n/a
Focal length
n/a
Aperture priority
Max. aperture
n/a
Metering types
Multi, Center-weighted, Spot, Partial
Multi, Center-weighted, Spot, Partial
Exposure compensation
±5 EV (in 1/3 EV, 1/2 EV steps)
±3 EV (in 1/3 EV, 1/2 EV steps)
Shutter priority
Shutter speed (min)
30s
30s
Shutter speed (max)
1/8000s
1/8000s
Built-in flash
External flash
Viewfinder type
Optical (pentaprism)
Electronic
White balance
6
6
Screen size
3"
3.2"
Screen resolution
1,040,000 dots
2,100,000 dots
Video available
Max. video resolution
3840x2160 (30p/‚Äč25p)
3840x2160 (30p/25p/24p)
Storage type
SD/SDHC/SDXC
SD/SDHC/SDXC
USB
USB 2.0 (480 Mbit/sec)
USB 3.0 (5 GBit/sec)
HDMI
Wireless support
GPS
Battery model
LP-E6N
LP-E6N
Battery type
lithium-ion
lithium-ion
Weight
701g
660g
Body size
140.7 x 104.8 x 76.8 mm
135.8 x 98.3 x 84.4 mm
Released
2019
2018


Compare various cameras

vs

Diagonal

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

Canon 90D diagonal

w = 22.30 mm
h = 14.90 mm
Diagonal =  22.30² + 14.90²   = 26.82 mm

Canon R 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.

90D sensor area

Width = 22.30 mm
Height = 14.90 mm

Surface area = 22.30 × 14.90 = 332.27 mm²

R 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

90D pixel pitch

Sensor width = 22.30 mm
Sensor resolution width = 6983 pixels
Pixel pitch =   22.30  × 1000  = 3.19 µm
6983

R pixel pitch

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


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

90D pixel area

Pixel pitch = 3.19 µm

Pixel area = 3.19² = 10.18 µm²

R pixel area

Pixel pitch = 5.34 µm

Pixel area = 5.34² = 28.52 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

90D pixel density

Sensor resolution width = 6983 pixels
Sensor width = 2.23 cm

Pixel density = (6983 / 2.23)² / 1000000 = 9.81 MP/cm²

R pixel density

Sensor resolution width = 6741 pixels
Sensor width = 3.6 cm

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

90D sensor resolution

Sensor width = 22.30 mm
Sensor height = 14.90 mm
Effective megapixels = 32.50
r = 22.30/14.90 = 1.5
X =  32.50 × 1000000  = 4655
1.5
Resolution horizontal: X × r = 4655 × 1.5 = 6983
Resolution vertical: X = 4655

Sensor resolution = 6983 x 4655

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


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


90D crop factor

Sensor diagonal in mm = 26.82 mm
Crop factor =   43.27  = 1.61
26.82

R 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).

90D 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 90D, take the aperture of the lens you're using and multiply it with crop factor.

Crop factor for Canon 90D is 1.61

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.

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