Zeiss ZX1 vs. Sony Cyber-shot DSC-RX1R

Comparison

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ZX1 image
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Cyber-shot DSC-RX1R image
Zeiss ZX1 Sony Cyber-shot DSC-RX1R
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Megapixels
37.40
24.30
Max. image resolution
7488 x 4992
6000 x 4000

Sensor

Sensor type
CMOS
CMOS
Sensor size
36 x 24 mm
35.8 x 23.9 mm
Sensor resolution
7490 x 4993
6038 x 4025
Diagonal
43.27 mm
43.04 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
1.01 : 1
(ratio)
Zeiss ZX1 Sony Cyber-shot DSC-RX1R
Surface area:
864.00 mm² vs 855.62 mm²
Difference: 8.38 mm² (1%)
ZX1 sensor is slightly bigger than RX1R sensor (only 1% difference).
Note: You are comparing cameras of different generations. There is a 5 year gap between Zeiss ZX1 (2018) and Sony RX1R (2013). All things being equal, newer sensor generations generally outperform the older.
Pixel pitch
4.81 µm
5.93 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: 1.12 µm (23%)
Pixel pitch of RX1R is approx. 23% higher than pixel pitch of ZX1.
Pixel area
23.14 µm²
35.16 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: 12.02 µm² (52%)
A pixel on Sony RX1R sensor is approx. 52% bigger than a pixel on Zeiss ZX1.
Pixel density
4.33 MP/cm²
2.84 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: 1.49 µm (52%)
Zeiss ZX1 has approx. 52% higher pixel density than Sony RX1R.
To learn about the accuracy of these numbers, click here.



Specs

Zeiss ZX1
Sony RX1R
Crop factor
1
1.01
Total megapixels
39.50
24.70
Effective megapixels
37.40
24.30
Optical zoom
1x
Digital zoom
Yes
ISO sensitivity
Auto, 80-51200
Auto, 100, 200, 400, 800, 1600, 3200, 6400, 12800, 25600
RAW
Manual focus
Normal focus range
30 cm
25 cm
Macro focus range
Focal length (35mm equiv.)
35 mm
35 mm
Aperture priority
Yes
Yes
Max. aperture
f2
f2.0
Max. aperture (35mm equiv.)
f2
f2
Metering
Multi, Center-weighted, Spot
Multi, Center-weighted, Spot
Exposure compensation
±3 EV (in 1/3 EV steps)
±3 EV (in 1/3 EV steps)
Shutter priority
Yes
Yes
Min. shutter speed
30 sec
30 sec
Max. shutter speed
1/8000 sec
1/2000 sec
Built-in flash
External flash
Viewfinder
Electronic
Electronic and Optical (optional)
White balance presets
7
9
Screen size
4.3"
3"
Screen resolution
921,600 dots
1,229,000 dots
Video capture
Max. video resolution
3840x2160 (30p)
Storage types
512GB internal
SD/SDHC/SDXC, Memory Stick Duo/Pro Duo/Pro-HG Duo
USB
USB 3.0 (5 GBit/sec)
USB 2.0 (480 Mbit/sec)
HDMI
Wireless
GPS
Battery
Li-ion Battery Pack
Lithium-Ion NP-BX1 battery
Weight
813 g
482 g
Dimensions
142 x 93 x 94 mm
113.3 x 65.4 x 69.6 mm
Year
2018
2013




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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

Zeiss ZX1 diagonal

w = 36.00 mm
h = 24.00 mm
Diagonal =  36.00² + 24.00²   = 43.27 mm

Sony RX1R diagonal

w = 35.80 mm
h = 23.90 mm
Diagonal =  35.80² + 23.90²   = 43.04 mm


Surface area

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

ZX1 sensor area

Width = 36.00 mm
Height = 24.00 mm

Surface area = 36.00 × 24.00 = 864.00 mm²

RX1R sensor area

Width = 35.80 mm
Height = 23.90 mm

Surface area = 35.80 × 23.90 = 855.62 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

ZX1 pixel pitch

Sensor width = 36.00 mm
Sensor resolution width = 7490 pixels
Pixel pitch =   36.00  × 1000  = 4.81 µm
7490

RX1R pixel pitch

Sensor width = 35.80 mm
Sensor resolution width = 6038 pixels
Pixel pitch =   35.80  × 1000  = 5.93 µm
6038


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

ZX1 pixel area

Pixel pitch = 4.81 µm

Pixel area = 4.81² = 23.14 µm²

RX1R pixel area

Pixel pitch = 5.93 µm

Pixel area = 5.93² = 35.16 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

ZX1 pixel density

Sensor resolution width = 7490 pixels
Sensor width = 3.6 cm

Pixel density = (7490 / 3.6)² / 1000000 = 4.33 MP/cm²

RX1R pixel density

Sensor resolution width = 6038 pixels
Sensor width = 3.58 cm

Pixel density = (6038 / 3.58)² / 1000000 = 2.84 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

ZX1 sensor resolution

Sensor width = 36.00 mm
Sensor height = 24.00 mm
Effective megapixels = 37.40
r = 36.00/24.00 = 1.5
X =  37.40 × 1000000  = 4993
1.5
Resolution horizontal: X × r = 4993 × 1.5 = 7490
Resolution vertical: X = 4993

Sensor resolution = 7490 x 4993

RX1R sensor resolution

Sensor width = 35.80 mm
Sensor height = 23.90 mm
Effective megapixels = 24.30
r = 35.80/23.90 = 1.5
X =  24.30 × 1000000  = 4025
1.5
Resolution horizontal: X × r = 4025 × 1.5 = 6038
Resolution vertical: X = 4025

Sensor resolution = 6038 x 4025


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


ZX1 crop factor

Sensor diagonal in mm = 43.27 mm
Crop factor =   43.27  = 1
43.27

RX1R crop factor

Sensor diagonal in mm = 43.04 mm
Crop factor =   43.27  = 1.01
43.04

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).

ZX1 equivalent aperture

Crop factor = 1
Aperture = f2

35-mm equivalent aperture = (f2) × 1 = f2

RX1R equivalent aperture

Crop factor = 1.01
Aperture = f2.0

35-mm equivalent aperture = (f2.0) × 1.01 = f2

More comparisons of Zeiss ZX1:

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