Sony a7R IV vs. Samsung NX1

Comparison

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a7R IV image
vs
NX1 image
Sony a7R IV Samsung NX1
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Megapixels
61.00
28.20
Max. image resolution
9504 x 6336
6480 x 4320

Sensor

Sensor type
CMOS
CMOS
Sensor size
35.7 x 23.8 mm
23.5 x 15.7 mm
Sensor resolution
9566 x 6377
6504 x 4336
Diagonal
42.91 mm
28.26 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
2.3 : 1
(ratio)
Sony a7R IV Samsung NX1
Surface area:
849.66 mm² vs 368.95 mm²
Difference: 480.71 mm² (130%)
a7R IV sensor is approx. 2.3x bigger than NX1 sensor.
Note: You are comparing cameras of different generations. There is a 5 year gap between Sony a7R IV (2019) and Samsung NX1 (2014). All things being equal, newer sensor generations generally outperform the older.
Pixel pitch
3.73 µm
3.61 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: 0.12 µm (3%)
Pixel pitch of a7R IV is approx. 3% higher than pixel pitch of NX1.
Pixel area
13.91 µm²
13.03 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: 0.88 µm² (7%)
A pixel on Sony a7R IV sensor is approx. 7% bigger than a pixel on Samsung NX1.
Pixel density
7.18 MP/cm²
7.66 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: 0.48 µm (7%)
Samsung NX1 has approx. 7% higher pixel density than Sony a7R IV.
To learn about the accuracy of these numbers, click here.



Specs

Sony a7R IV
Samsung NX1
Crop factor
1.01
1.53
Total megapixels
62.50
30.70
Effective megapixels
61.00
28.20
Optical zoom
 
Digital zoom
Yes
Yes
ISO sensitivity
Auto, 100-32000 (expandable to 50-102400)
Auto, 100 - 25600 (extends to 51200)
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, Highlight-weighted, Average, Spot
Multi, Center-weighted, Spot
Exposure compensation
±5 EV (in 1/3 EV, 1/2 EV steps)
±5 EV (in 1/3 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
Electronic
White balance presets
9
8
Screen size
3"
3"
Screen resolution
1,440,000 dots
1,036,000 dots
Video capture
Max. video resolution
3840x2160 (30p/​25p/​24p)
4096x2160 (24p)
Storage types
SD/SDHC/SDXC
SD/SDHC/SDXC/UHS-I/UHS-II
USB
USB 3.0 (5 GBit/sec)
USB 3.0 (5 GBit/sec)
HDMI
Wireless
GPS
Battery
NP-FZ100 lithium-ion battery
BP-1900
Weight
665 g
550 g
Dimensions
128.9 x 96.4 x 77.5 mm
138.5 x 102.3 x 65.8 mm
Year
2019
2014




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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

Sony a7R IV diagonal

w = 35.70 mm
h = 23.80 mm
Diagonal =  35.70² + 23.80²   = 42.91 mm

Samsung NX1 diagonal

w = 23.50 mm
h = 15.70 mm
Diagonal =  23.50² + 15.70²   = 28.26 mm


Surface area

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

a7R IV sensor area

Width = 35.70 mm
Height = 23.80 mm

Surface area = 35.70 × 23.80 = 849.66 mm²

NX1 sensor area

Width = 23.50 mm
Height = 15.70 mm

Surface area = 23.50 × 15.70 = 368.95 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

a7R IV pixel pitch

Sensor width = 35.70 mm
Sensor resolution width = 9566 pixels
Pixel pitch =   35.70  × 1000  = 3.73 µm
9566

NX1 pixel pitch

Sensor width = 23.50 mm
Sensor resolution width = 6504 pixels
Pixel pitch =   23.50  × 1000  = 3.61 µm
6504


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

a7R IV pixel area

Pixel pitch = 3.73 µm

Pixel area = 3.73² = 13.91 µm²

NX1 pixel area

Pixel pitch = 3.61 µm

Pixel area = 3.61² = 13.03 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

a7R IV pixel density

Sensor resolution width = 9566 pixels
Sensor width = 3.57 cm

Pixel density = (9566 / 3.57)² / 1000000 = 7.18 MP/cm²

NX1 pixel density

Sensor resolution width = 6504 pixels
Sensor width = 2.35 cm

Pixel density = (6504 / 2.35)² / 1000000 = 7.66 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

a7R IV sensor resolution

Sensor width = 35.70 mm
Sensor height = 23.80 mm
Effective megapixels = 61.00
r = 35.70/23.80 = 1.5
X =  61.00 × 1000000  = 6377
1.5
Resolution horizontal: X × r = 6377 × 1.5 = 9566
Resolution vertical: X = 6377

Sensor resolution = 9566 x 6377

NX1 sensor resolution

Sensor width = 23.50 mm
Sensor height = 15.70 mm
Effective megapixels = 28.20
r = 23.50/15.70 = 1.5
X =  28.20 × 1000000  = 4336
1.5
Resolution horizontal: X × r = 4336 × 1.5 = 6504
Resolution vertical: X = 4336

Sensor resolution = 6504 x 4336


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


a7R IV crop factor

Sensor diagonal in mm = 42.91 mm
Crop factor =   43.27  = 1.01
42.91

NX1 crop factor

Sensor diagonal in mm = 28.26 mm
Crop factor =   43.27  = 1.53
28.26

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).

a7R IV 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 a7R IV, take the aperture of the lens you're using and multiply it with crop factor.

Crop factor for Sony a7R IV is 1.01

NX1 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 Samsung NX1, take the aperture of the lens you're using and multiply it with crop factor.

Crop factor for Samsung NX1 is 1.53

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