Leica Q2 vs. Kodak DCS620

Comparison

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Q2 image
vs
DCS620 image
Leica Q2 Kodak DCS620
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Megapixels
47.30
2.00
Max. image resolution
8368 x 5584
1728 x 1152

Sensor

Sensor type
CMOS
CCD
Sensor size
36 x 24 mm
27.65 x 18.43 mm
Sensor resolution
8423 x 5615
1733 x 1155
Diagonal
43.27 mm
33.23 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
1.7 : 1
(ratio)
Leica Q2 Kodak DCS620
Surface area:
864.00 mm² vs 509.59 mm²
Difference: 354.41 mm² (70%)
Q2 sensor is approx. 1.7x bigger than DCS620 sensor.
Note: You are comparing sensors of vastly different generations. There is a gap of 20 years between Leica Q2 (2019) and Kodak DCS620 (1999). Twenty years is a huge amount of time, technology wise, resulting in newer sensor being much more efficient than the older one.
Pixel pitch
4.27 µm
15.95 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: 11.68 µm (274%)
Pixel pitch of DCS620 is approx. 274% higher than pixel pitch of Q2.
Pixel area
18.23 µm²
254.4 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: 236.17 µm² (1296%)
A pixel on Kodak DCS620 sensor is approx. 1296% bigger than a pixel on Leica Q2.
Pixel density
5.47 MP/cm²
0.39 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: 5.08 µm (1303%)
Leica Q2 has approx. 1303% higher pixel density than Kodak DCS620.
To learn about the accuracy of these numbers, click here.



Specs

Leica Q2
Kodak DCS620
Crop factor
1
1.3
Total megapixels
50.40
2.00
Effective megapixels
47.30
2.00
Optical zoom
1x
Digital zoom
Yes
No
ISO sensitivity
Auto, 50-50000
200, 400, 800, 1600
RAW
Manual focus
Normal focus range
30 cm
Macro focus range
17 cm
Focal length (35mm equiv.)
28 mm
Aperture priority
Yes
Yes
Max. aperture
f1.7
Max. aperture (35mm equiv.)
f1.7
n/a
Metering
Multi, Center-weighted, Spot
Multi, Center-weighted, Spot
Exposure compensation
±3 EV (in 1/3 EV steps)
±3 EV (in 1/3 EV, 1/2 EV steps)
Shutter priority
Yes
Yes
Min. shutter speed
60 sec
30 sec
Max. shutter speed
1/40000 sec
1/8000 sec
Built-in flash
External flash
Viewfinder
Electronic
Optical (tunnel)
White balance presets
5
5
Screen size
3"
2"
Screen resolution
1,040,000 dots
72,000 dots
Video capture
Max. video resolution
4096x2160 (24p)
Storage types
SD/SDHC/SDXC
PCMCIA (2 x type II / 1 x type III)
USB
USB 1.0
HDMI
Wireless
GPS
Battery
BP-SCL4 Lithium-ion battery
Kodak NiCD / NiMH
Weight
734 g
1580 g
Dimensions
130 x 80 x 91.9 mm
194 x 158 x 88 mm
Year
2019
1999




Choose cameras to compare

vs

Diagonal

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

Leica Q2 diagonal

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

Kodak DCS620 diagonal

w = 27.65 mm
h = 18.43 mm
Diagonal =  27.65² + 18.43²   = 33.23 mm


Surface area

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

Q2 sensor area

Width = 36.00 mm
Height = 24.00 mm

Surface area = 36.00 × 24.00 = 864.00 mm²

DCS620 sensor area

Width = 27.65 mm
Height = 18.43 mm

Surface area = 27.65 × 18.43 = 509.59 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

Q2 pixel pitch

Sensor width = 36.00 mm
Sensor resolution width = 8423 pixels
Pixel pitch =   36.00  × 1000  = 4.27 µm
8423

DCS620 pixel pitch

Sensor width = 27.65 mm
Sensor resolution width = 1733 pixels
Pixel pitch =   27.65  × 1000  = 15.95 µm
1733


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

Q2 pixel area

Pixel pitch = 4.27 µm

Pixel area = 4.27² = 18.23 µm²

DCS620 pixel area

Pixel pitch = 15.95 µm

Pixel area = 15.95² = 254.4 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

Q2 pixel density

Sensor resolution width = 8423 pixels
Sensor width = 3.6 cm

Pixel density = (8423 / 3.6)² / 1000000 = 5.47 MP/cm²

DCS620 pixel density

Sensor resolution width = 1733 pixels
Sensor width = 2.765 cm

Pixel density = (1733 / 2.765)² / 1000000 = 0.39 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

Q2 sensor resolution

Sensor width = 36.00 mm
Sensor height = 24.00 mm
Effective megapixels = 47.30
r = 36.00/24.00 = 1.5
X =  47.30 × 1000000  = 5615
1.5
Resolution horizontal: X × r = 5615 × 1.5 = 8423
Resolution vertical: X = 5615

Sensor resolution = 8423 x 5615

DCS620 sensor resolution

Sensor width = 27.65 mm
Sensor height = 18.43 mm
Effective megapixels = 2.00
r = 27.65/18.43 = 1.5
X =  2.00 × 1000000  = 1155
1.5
Resolution horizontal: X × r = 1155 × 1.5 = 1733
Resolution vertical: X = 1155

Sensor resolution = 1733 x 1155


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


Q2 crop factor

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

DCS620 crop factor

Sensor diagonal in mm = 33.23 mm
Crop factor =   43.27  = 1.3
33.23

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).

Q2 equivalent aperture

Crop factor = 1
Aperture = f1.7

35-mm equivalent aperture = (f1.7) × 1 = f1.7

DCS620 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 Kodak DCS620, take the aperture of the lens you're using and multiply it with crop factor.

Crop factor for Kodak DCS620 is 1.3

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