Olympus PEN E-PL7 vs. Sony Alpha a6000

Comparison

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PEN E-PL7 image
vs
Alpha a6000 image
Olympus PEN E-PL7 Sony Alpha a6000
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Megapixels
16.10
24.30
Max. image resolution
4608 x 3456
6000 x 4000

Sensor

Sensor type
CMOS
CMOS
Sensor size
Four Thirds (17.3 x 13 mm)
23.5 x 15.6 mm
Sensor resolution
4627 x 3479
6058 x 4012
Diagonal
21.64 mm
28.21 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 : 1.63
(ratio)
Olympus PEN E-PL7 Sony Alpha a6000
Surface area:
224.90 mm² vs 366.60 mm²
Difference: 141.7 mm² (63%)
Alpha a6000 sensor is approx. 1.63x bigger than PEN E-PL7 sensor.
Pixel pitch
3.74 µm
3.88 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: 0.14 µm (4%)
Pixel pitch of Alpha a6000 is approx. 4% higher than pixel pitch of PEN E-PL7.
Pixel area
13.99 µm²
15.05 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: 1.06 µm² (8%)
A pixel on Sony Alpha a6000 sensor is approx. 8% bigger than a pixel on Olympus PEN E-PL7.
Pixel density
7.15 MP/cm²
6.65 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: 0.5 µm (8%)
Olympus PEN E-PL7 has approx. 8% higher pixel density than Sony Alpha a6000.
To learn about the accuracy of these numbers, click here.



Specs

Olympus PEN E-PL7
Sony Alpha a6000
Crop factor
2
1.53
Total megapixels
17.20
24.70
Effective megapixels
16.10
24.30
Optical zoom
Digital zoom
Yes
ISO sensitivity
Auto, 200 - 25600
Auto, 100-25600
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
Multi, Center-weighted, Spot
Exposure compensation
±5 EV (in 1/3 EV, 1/2 EV, 1 EV steps)
±5 EV (in 1/3 EV, 1/2 EV steps)
Shutter priority
Yes
Yes
Min. shutter speed
60 sec
30 sec
Max. shutter speed
1/4000 sec
1/4000 sec
Built-in flash
External flash
Viewfinder
None
Electronic
White balance presets
7
10
Screen size
3"
3"
Screen resolution
1,037,000 dots
921,600 dots
Video capture
Max. video resolution
1920x1080 (30p)
1920x1080 (60p/60i/24p)
Storage types
SD/SDHC/SDXC
SD/SDHC/SDXC, Memory Stick Duo/Pro Duo/Pro-HG Duo
USB
USB 2.0 (480 Mbit/sec)
USB 2.0 (480 Mbit/sec)
HDMI
Wireless
GPS
Battery
BLS-50 Li-ion battery
NP-FW50 lithium-ion battery
Weight
357 g
344 g
Dimensions
114.9 x 67 x 38.4 mm
120 x 67 x 45 mm
Year
2014
2014




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vs

Diagonal

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

Olympus PEN E-PL7 diagonal

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

Sony Alpha a6000 diagonal

w = 23.50 mm
h = 15.60 mm
Diagonal =  23.50² + 15.60²   = 28.21 mm


Surface area

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

PEN E-PL7 sensor area

Width = 17.30 mm
Height = 13.00 mm

Surface area = 17.30 × 13.00 = 224.90 mm²

Alpha a6000 sensor area

Width = 23.50 mm
Height = 15.60 mm

Surface area = 23.50 × 15.60 = 366.60 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

PEN E-PL7 pixel pitch

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

Alpha a6000 pixel pitch

Sensor width = 23.50 mm
Sensor resolution width = 6058 pixels
Pixel pitch =   23.50  × 1000  = 3.88 µm
6058


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

PEN E-PL7 pixel area

Pixel pitch = 3.74 µm

Pixel area = 3.74² = 13.99 µm²

Alpha a6000 pixel area

Pixel pitch = 3.88 µm

Pixel area = 3.88² = 15.05 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

PEN E-PL7 pixel density

Sensor resolution width = 4627 pixels
Sensor width = 1.73 cm

Pixel density = (4627 / 1.73)² / 1000000 = 7.15 MP/cm²

Alpha a6000 pixel density

Sensor resolution width = 6058 pixels
Sensor width = 2.35 cm

Pixel density = (6058 / 2.35)² / 1000000 = 6.65 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

PEN E-PL7 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

Alpha a6000 sensor resolution

Sensor width = 23.50 mm
Sensor height = 15.60 mm
Effective megapixels = 24.30
r = 23.50/15.60 = 1.51
X =  24.30 × 1000000  = 4012
1.51
Resolution horizontal: X × r = 4012 × 1.51 = 6058
Resolution vertical: X = 4012

Sensor resolution = 6058 x 4012


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


PEN E-PL7 crop factor

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

Alpha a6000 crop factor

Sensor diagonal in mm = 28.21 mm
Crop factor =   43.27  = 1.53
28.21

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).

PEN E-PL7 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-PL7, take the aperture of the lens you're using and multiply it with crop factor.

Crop factor for Olympus PEN E-PL7 is 2

Alpha a6000 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 Sony Alpha a6000, take the aperture of the lens you're using and multiply it with crop factor.

Crop factor for Sony Alpha a6000 is 1.53

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