Konica-Minolta DiMAGE X50 vs. Minolta DiMAGE X20

Comparison

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DiMAGE X50 image
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DiMAGE X20 image
Konica-Minolta DiMAGE X50 Minolta DiMAGE X20
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Megapixels
5.00
2.10
Max. image resolution
2560 x 1920
1600 x 1200

Sensor

Sensor type
CCD
CCD
Sensor size
1/2.5" (~ 5.75 x 4.32 mm)
1/3.2" (~ 4.5 x 3.37 mm)
Sensor resolution
2579 x 1939
1678 x 1252
Diagonal
7.19 mm
5.62 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
1.64 : 1
(ratio)
Konica-Minolta DiMAGE X50 Minolta DiMAGE X20
Surface area:
24.84 mm² vs 15.17 mm²
Difference: 9.67 mm² (64%)
DiMAGE X50 sensor is approx. 1.64x bigger than DiMAGE X20 sensor.
Pixel pitch
2.23 µm
2.68 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: 0.45 µm (20%)
Pixel pitch of DiMAGE X20 is approx. 20% higher than pixel pitch of DiMAGE X50.
Pixel area
4.97 µm²
7.18 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: 2.21 µm² (44%)
A pixel on Minolta DiMAGE X20 sensor is approx. 44% bigger than a pixel on Konica-Minolta DiMAGE X50.
Pixel density
20.12 MP/cm²
13.9 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: 6.22 µm (45%)
Konica-Minolta DiMAGE X50 has approx. 45% higher pixel density than Minolta DiMAGE X20.
To learn about the accuracy of these numbers, click here.



Specs

Konica-Minolta DiMAGE X50
Minolta DiMAGE X20
Crop factor
6.02
7.7
Total megapixels
Effective megapixels
Optical zoom
2.8x
3x
Digital zoom
Yes
Yes
ISO sensitivity
Auto, 50, 100, 200, 400
64, 100, 200, 400
RAW
Manual focus
Normal focus range
10 cm
25 cm
Macro focus range
6 cm
10 cm
Focal length (35mm equiv.)
37 - 105 mm
37 - 111 mm
Aperture priority
No
No
Max. aperture
f2.8 - f5
f2.8 - f3.7
Max. aperture (35mm equiv.)
f16.9 - f30.1
f21.6 - f28.5
Metering
256-segment Matrix
Matrix
Exposure compensation
±2 EV (in 1/3 EV steps)
±2 EV (in 1/3 EV steps)
Shutter priority
No
No
Min. shutter speed
4 sec
4 sec
Max. shutter speed
1/1000 sec
1/1000 sec
Built-in flash
External flash
Viewfinder
Optical (tunnel)
None
White balance presets
5
6
Screen size
2"
1.5"
Screen resolution
115,000 dots
84,960 dots
Video capture
Max. video resolution
Storage types
MultiMedia, Secure Digital
MultiMedia, Secure Digital
USB
USB 1.0
USB 1.0
HDMI
Wireless
GPS
Battery
Lithium-Ion (NP-700)
AA (2) batteries (NiMH recommended)
Weight
125 g
115 g
Dimensions
83.5 x 62 x 23.5 mm
86 x 67 x 24 mm
Year
2004
2003




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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

Konica-Minolta DiMAGE X50 diagonal

The diagonal of DiMAGE X50 sensor is not 1/2.5 or 0.4" (10.2 mm) as you might expect, but approximately two thirds of that value - 7.19 mm. If you want to know why, see sensor sizes.

w = 5.75 mm
h = 4.32 mm
Diagonal =  5.75² + 4.32²   = 7.19 mm

Minolta DiMAGE X20 diagonal

The diagonal of DiMAGE X20 sensor is not 1/3.2 or 0.31" (7.9 mm) as you might expect, but approximately two thirds of that value - 5.62 mm. If you want to know why, see sensor sizes.

w = 4.50 mm
h = 3.37 mm
Diagonal =  4.50² + 3.37²   = 5.62 mm


Surface area

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

DiMAGE X50 sensor area

Width = 5.75 mm
Height = 4.32 mm

Surface area = 5.75 × 4.32 = 24.84 mm²

DiMAGE X20 sensor area

Width = 4.50 mm
Height = 3.37 mm

Surface area = 4.50 × 3.37 = 15.17 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

DiMAGE X50 pixel pitch

Sensor width = 5.75 mm
Sensor resolution width = 2579 pixels
Pixel pitch =   5.75  × 1000  = 2.23 µm
2579

DiMAGE X20 pixel pitch

Sensor width = 4.50 mm
Sensor resolution width = 1678 pixels
Pixel pitch =   4.50  × 1000  = 2.68 µm
1678


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

DiMAGE X50 pixel area

Pixel pitch = 2.23 µm

Pixel area = 2.23² = 4.97 µm²

DiMAGE X20 pixel area

Pixel pitch = 2.68 µm

Pixel area = 2.68² = 7.18 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

DiMAGE X50 pixel density

Sensor resolution width = 2579 pixels
Sensor width = 0.575 cm

Pixel density = (2579 / 0.575)² / 1000000 = 20.12 MP/cm²

DiMAGE X20 pixel density

Sensor resolution width = 1678 pixels
Sensor width = 0.45 cm

Pixel density = (1678 / 0.45)² / 1000000 = 13.9 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

DiMAGE X50 sensor resolution

Sensor width = 5.75 mm
Sensor height = 4.32 mm
Effective megapixels = 5.00
r = 5.75/4.32 = 1.33
X =  5.00 × 1000000  = 1939
1.33
Resolution horizontal: X × r = 1939 × 1.33 = 2579
Resolution vertical: X = 1939

Sensor resolution = 2579 x 1939

DiMAGE X20 sensor resolution

Sensor width = 4.50 mm
Sensor height = 3.37 mm
Effective megapixels = 2.10
r = 4.50/3.37 = 1.34
X =  2.10 × 1000000  = 1252
1.34
Resolution horizontal: X × r = 1252 × 1.34 = 1678
Resolution vertical: X = 1252

Sensor resolution = 1678 x 1252


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


DiMAGE X50 crop factor

Sensor diagonal in mm = 7.19 mm
Crop factor =   43.27  = 6.02
7.19

DiMAGE X20 crop factor

Sensor diagonal in mm = 5.62 mm
Crop factor =   43.27  = 7.7
5.62

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).

DiMAGE X50 equivalent aperture

Crop factor = 6.02
Aperture = f2.8 - f5

35-mm equivalent aperture = (f2.8 - f5) × 6.02 = f16.9 - f30.1

DiMAGE X20 equivalent aperture

Crop factor = 7.7
Aperture = f2.8 - f3.7

35-mm equivalent aperture = (f2.8 - f3.7) × 7.7 = f21.6 - f28.5

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