Canon PowerShot G7 X Mark II vs. Olympus PEN E-PL8

Comparison

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PowerShot G7 X Mark II image
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PEN E-PL8 image
Canon PowerShot G7 X Mark II Olympus PEN E-PL8
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Megapixels
20.10
16.10
Max. image resolution
5472 x 3648
4608 x 3456

Sensor

Sensor type
CMOS
CMOS
Sensor size
13.2 x 8.8 mm
Four Thirds (17.3 x 13 mm)
Sensor resolution
5492 x 3661
4627 x 3479
Diagonal
15.86 mm
21.64 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

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vs
1 : 1.94
(ratio)
Canon PowerShot G7 X Mark II Olympus PEN E-PL8
Surface area:
116.16 mm² vs 224.90 mm²
Difference: 108.74 mm² (94%)
PEN E-PL8 sensor is approx. 1.94x bigger than G7 X Mark II sensor.
Pixel pitch
2.4 µm
3.74 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: 1.34 µm (56%)
Pixel pitch of PEN E-PL8 is approx. 56% higher than pixel pitch of G7 X Mark II.
Pixel area
5.76 µm²
13.99 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: 8.23 µm² (143%)
A pixel on Olympus PEN E-PL8 sensor is approx. 143% bigger than a pixel on Canon G7 X Mark II.
Pixel density
17.31 MP/cm²
7.15 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: 10.16 µm (142%)
Canon G7 X Mark II has approx. 142% higher pixel density than Olympus PEN E-PL8.
To learn about the accuracy of these numbers, click here.



Specs

Canon G7 X Mark II
Olympus PEN E-PL8
Crop factor
2.73
2
Total megapixels
20.90
17.20
Effective megapixels
20.10
16.10
Optical zoom
4.2x
Digital zoom
Yes
Yes
ISO sensitivity
Auto, 125-12800 (expands to 25600)
Auto, 200 - 25600 (extends to 100)
RAW
Manual focus
Normal focus range
5 cm
Macro focus range
5 cm
Focal length (35mm equiv.)
24 - 100 mm
Aperture priority
Yes
Yes
Max. aperture
f1.8 - f2.8
Max. aperture (35mm equiv.)
f4.9 - f7.6
n/a
Metering
Multi, Center-weighted, Spot
Multi, Center-weighted, Spot
Exposure compensation
±3 EV (in 1/3 EV steps)
±5 EV (in 1/3 EV, 1/2 EV, 1 EV steps)
Shutter priority
Yes
Yes
Min. shutter speed
15 sec
60 sec
Max. shutter speed
1/2000 sec
1/4000 sec
Built-in flash
External flash
Viewfinder
None
Electronic (optional)
White balance presets
8
7
Screen size
3"
3"
Screen resolution
1,040,000 dots
1,036,800 dots
Video capture
Max. video resolution
1920x1080 (60p/30p/24p)
1920x1080 (30p)
Storage types
SD/SDHC/SDXC
SD/SDHC/SDXC
USB
USB 2.0 (480 Mbit/sec)
USB 2.0 (480 Mbit/sec)
HDMI
Wireless
GPS
Battery
NB-13L lithium-ion battery
BLS-50 lithium-ion battery
Weight
319 g
374 g
Dimensions
105.5 x 60.9 x 42 mm
117.1 x 68.3 x 38.4 mm
Year
2016
2016




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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 G7 X Mark II diagonal

w = 13.20 mm
h = 8.80 mm
Diagonal =  13.20² + 8.80²   = 15.86 mm

Olympus PEN E-PL8 diagonal

w = 17.30 mm
h = 13.00 mm
Diagonal =  17.30² + 13.00²   = 21.64 mm


Surface area

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

G7 X Mark II sensor area

Width = 13.20 mm
Height = 8.80 mm

Surface area = 13.20 × 8.80 = 116.16 mm²

PEN E-PL8 sensor area

Width = 17.30 mm
Height = 13.00 mm

Surface area = 17.30 × 13.00 = 224.90 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

G7 X Mark II pixel pitch

Sensor width = 13.20 mm
Sensor resolution width = 5492 pixels
Pixel pitch =   13.20  × 1000  = 2.4 µm
5492

PEN E-PL8 pixel pitch

Sensor width = 17.30 mm
Sensor resolution width = 4627 pixels
Pixel pitch =   17.30  × 1000  = 3.74 µm
4627


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

G7 X Mark II pixel area

Pixel pitch = 2.4 µm

Pixel area = 2.4² = 5.76 µm²

PEN E-PL8 pixel area

Pixel pitch = 3.74 µm

Pixel area = 3.74² = 13.99 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

G7 X Mark II pixel density

Sensor resolution width = 5492 pixels
Sensor width = 1.32 cm

Pixel density = (5492 / 1.32)² / 1000000 = 17.31 MP/cm²

PEN E-PL8 pixel density

Sensor resolution width = 4627 pixels
Sensor width = 1.73 cm

Pixel density = (4627 / 1.73)² / 1000000 = 7.15 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

G7 X Mark II sensor resolution

Sensor width = 13.20 mm
Sensor height = 8.80 mm
Effective megapixels = 20.10
r = 13.20/8.80 = 1.5
X =  20.10 × 1000000  = 3661
1.5
Resolution horizontal: X × r = 3661 × 1.5 = 5492
Resolution vertical: X = 3661

Sensor resolution = 5492 x 3661

PEN E-PL8 sensor resolution

Sensor width = 17.30 mm
Sensor height = 13.00 mm
Effective megapixels = 16.10
r = 17.30/13.00 = 1.33
X =  16.10 × 1000000  = 3479
1.33
Resolution horizontal: X × r = 3479 × 1.33 = 4627
Resolution vertical: X = 3479

Sensor resolution = 4627 x 3479


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


G7 X Mark II crop factor

Sensor diagonal in mm = 15.86 mm
Crop factor =   43.27  = 2.73
15.86

PEN E-PL8 crop factor

Sensor diagonal in mm = 21.64 mm
Crop factor =   43.27  = 2
21.64

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).

G7 X Mark II equivalent aperture

Crop factor = 2.73
Aperture = f1.8 - f2.8

35-mm equivalent aperture = (f1.8 - f2.8) × 2.73 = f4.9 - f7.6

PEN E-PL8 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 Olympus PEN E-PL8, take the aperture of the lens you're using and multiply it with crop factor.

Crop factor for Olympus PEN E-PL8 is 2

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