Canon EOS 90D vs Canon EOS 70D Comparison

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EOS 90D image
vs
EOS 70D image
Canon EOS 90D Canon EOS 70D
Megapixels
32.50
20.20
Image resolution
6960 x 4640
5472 x 3648

Sensor

Sensor type
CMOS
CMOS
Sensor size
22.3 x 14.9 mm
22.5 x 15 mm
Sensor resolution
6983 x 4655
5505 x 3670
Diagonal
26.82 mm
27.04 mm
Compare sensor size:

Sensor Size

Actual size is set to screen
vs
1:1.02
(ratio)
Canon EOS 90D Canon EOS 70D
Surface area:
332.27 mm² vs 337.50 mm²
Difference: 5.23 mm² (2%)
70D sensor is slightly bigger than 90D sensor (only 2% difference).
Note: You are comparing sensors of very different generations. There is a gap of 6 years between Canon 90D (2019) and Canon 70D (2013). 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
3.19 µm
4.09 µm
Difference: 0.9 µm (28%)
Pixel pitch of 70D is ~28% higher than 90D's.
Pixel area
10.18 µm²
16.73 µm²
Relative pixel sizes:
vs
Pixel area difference: 6.55 µm² (64%)
Pixel on Canon 70D sensor is ~64% bigger than Canon 90D's.
Pixel density
9.81 MP/cm²
5.99 MP/cm²
Difference: 3.82 µm (64%)
Canon 90D has ~64% higher pixel density than Canon 70D's.

Specs

Canon 90D
Canon 70D
Crop factor
1.61
1.6
Megapixels
34.40
20.90
Optical zoom
n/a
Digital zoom
n/a
ISO range
Auto, 100-25600 (expands to 51200)
Auto, 100, 200, 400, 800, 1600, 3200, 6400, 12800 (25600 with boost)
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)
±5 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)
Optical (pentaprism)
White balance
6
6
Screen size
3"
3"
Screen resolution
1,040,000 dots
1,040,000 dots
Video available
Max. video resolution
3840x2160 (30p/‚Äč25p)
1920x1080 (30p/25p/24p)
Storage type
SD/SDHC/SDXC
SD/SDHC/SDXC
USB Version
2.0 (480 Mbit/sec)
2.0 (480 Mbit/sec)
HDMI
Wireless support
GPS
Battery
LP-E6N lithium-ion battery
Rechargeable Li-ion Battery LP-E6
Weight
701g
755g
Body size
140.7 x 104.8 x 76.8 mm
139 x 104.3 x 78.5 mm
Released
2019
2013


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 70D diagonal

w = 22.50 mm
h = 15.00 mm
Diagonal =  22.50² + 15.00²   = 27.04 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

70D sensor area

Width = 22.50 mm
Height = 15.00 mm

Surface area = 22.50 × 15.00 = 337.50 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

70D pixel pitch

Sensor width = 22.50 mm
Sensor resolution width = 5505 pixels
Pixel pitch =   22.50  × 1000  = 4.09 µm
5505


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

70D pixel area

Pixel pitch = 4.09 µm

Pixel area = 4.09² = 16.73 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

70D pixel density

Sensor resolution width = 5505 pixels
Sensor width = 2.25 cm

Pixel density = (5505 / 2.25)² / 1000000 = 5.99 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

70D sensor resolution

Sensor width = 22.50 mm
Sensor height = 15.00 mm
Effective megapixels = 20.20
r = 22.50/15.00 = 1.5
X =  20.20 × 1000000  = 3670
1.5
Resolution horizontal: X × r = 3670 × 1.5 = 5505
Resolution vertical: X = 3670

Sensor resolution = 5505 x 3670


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

70D crop factor

Sensor diagonal in mm = 27.04 mm
Crop factor =   43.27  = 1.6
27.04

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

70D 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 70D, take the aperture of the lens you're using and multiply it with crop factor.

Crop factor for Canon 70D is 1.6

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