Konica-Minolta DiMAGE A2 vs. Sony Cyber-shot DSC-RX100

Comparison

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DiMAGE A2 image
vs
Cyber-shot DSC-RX100 image
Konica-Minolta DiMAGE A2 Sony Cyber-shot DSC-RX100
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Megapixels
8.00
20.20
Max. image resolution
3264 x 2448
5472 x 3648

Sensor

Sensor type
CCD
CMOS
Sensor size
2/3" (~ 8.8 x 6.6 mm)
13.2 x 8.8 mm
Sensor resolution
3262 x 2453
5505 x 3670
Diagonal
11.00 mm
15.86 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 : 2
(ratio)
Konica-Minolta DiMAGE A2 Sony Cyber-shot DSC-RX100
Surface area:
58.08 mm² vs 116.16 mm²
Difference: 58.08 mm² (100%)
RX100 sensor is approx. 2x bigger than DiMAGE A2 sensor.
Note: You are comparing sensors of very different generations. There is a gap of 8 years between Konica-Minolta DiMAGE A2 (2004) and Sony RX100 (2012). Eight years is a lot of time in terms of technology, meaning newer sensors are overall much more efficient than the older ones.
Pixel pitch
2.7 µm
2.4 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: 0.3 µm (13%)
Pixel pitch of DiMAGE A2 is approx. 13% higher than pixel pitch of RX100.
Pixel area
7.29 µm²
5.76 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: 1.53 µm² (27%)
A pixel on Konica-Minolta DiMAGE A2 sensor is approx. 27% bigger than a pixel on Sony RX100.
Pixel density
13.74 MP/cm²
17.39 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: 3.65 µm (27%)
Sony RX100 has approx. 27% higher pixel density than Konica-Minolta DiMAGE A2.
To learn about the accuracy of these numbers, click here.



Specs

Konica-Minolta DiMAGE A2
Sony RX100
Crop factor
3.93
2.73
Total megapixels
20.90
Effective megapixels
20.20
Optical zoom
7.1x
3.6x
Digital zoom
Yes
Yes
ISO sensitivity
Auto, 64, 100, 200, 400, 800
Auto, 80, 100, 125, 200, 400, 800, 1600, 3200, 6400
RAW
Manual focus
Normal focus range
50 cm
Macro focus range
13 cm
5 cm
Focal length (35mm equiv.)
28 - 200 mm
28 - 100 mm
Aperture priority
Yes
Yes
Max. aperture
f2.8 - f3.5
f1.8 - f4.9
Max. aperture (35mm equiv.)
f11 - f13.8
f4.9 - f13.4
Metering
Multi, Center-weighted, Spot
Exposure compensation
±2 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
1/4000 sec
1/2000 sec
Built-in flash
External flash
Viewfinder
Electronic
None
White balance presets
6
9
Screen size
1.8"
3"
Screen resolution
113,000 dots
1,228,800 dots
Video capture
Max. video resolution
1920x1080 (60p)
Storage types
Compact Flash (Type I or II)
SD/SDHC/SDXC, Memory Stick Duo/Pro Duo/Pro-HG Duo
USB
USB 1.0
USB 2.0 (480 Mbit/sec)
HDMI
Wireless
GPS
Battery
AA (4) batteries (NiMH recommended)
Lithium-Ion NP-BX1 battery
Weight
639 g
213 g
Dimensions
117 x 85 x 114 mm
102 x 59 x 36 mm
Year
2004
2012




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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 A2 diagonal

The diagonal of DiMAGE A2 sensor is not 2/3 or 0.67" (16.9 mm) as you might expect, but approximately two thirds of that value - 11 mm. If you want to know why, see sensor sizes.

w = 8.80 mm
h = 6.60 mm
Diagonal =  8.80² + 6.60²   = 11.00 mm

Sony RX100 diagonal

w = 13.20 mm
h = 8.80 mm
Diagonal =  13.20² + 8.80²   = 15.86 mm


Surface area

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

DiMAGE A2 sensor area

Width = 8.80 mm
Height = 6.60 mm

Surface area = 8.80 × 6.60 = 58.08 mm²

RX100 sensor area

Width = 13.20 mm
Height = 8.80 mm

Surface area = 13.20 × 8.80 = 116.16 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 A2 pixel pitch

Sensor width = 8.80 mm
Sensor resolution width = 3262 pixels
Pixel pitch =   8.80  × 1000  = 2.7 µm
3262

RX100 pixel pitch

Sensor width = 13.20 mm
Sensor resolution width = 5505 pixels
Pixel pitch =   13.20  × 1000  = 2.4 µm
5505


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 A2 pixel area

Pixel pitch = 2.7 µm

Pixel area = 2.7² = 7.29 µm²

RX100 pixel area

Pixel pitch = 2.4 µm

Pixel area = 2.4² = 5.76 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 A2 pixel density

Sensor resolution width = 3262 pixels
Sensor width = 0.88 cm

Pixel density = (3262 / 0.88)² / 1000000 = 13.74 MP/cm²

RX100 pixel density

Sensor resolution width = 5505 pixels
Sensor width = 1.32 cm

Pixel density = (5505 / 1.32)² / 1000000 = 17.39 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

DiMAGE A2 sensor resolution

Sensor width = 8.80 mm
Sensor height = 6.60 mm
Effective megapixels = 8.00
r = 8.80/6.60 = 1.33
X =  8.00 × 1000000  = 2453
1.33
Resolution horizontal: X × r = 2453 × 1.33 = 3262
Resolution vertical: X = 2453

Sensor resolution = 3262 x 2453

RX100 sensor resolution

Sensor width = 13.20 mm
Sensor height = 8.80 mm
Effective megapixels = 20.20
r = 13.20/8.80 = 1.5
X =  20.20 × 1000000  = 3670
1.5
Resolution horizontal: X × r = 3670 × 1.5 = 5505
Resolution vertical: X = 3670

Sensor resolution = 5505 x 3670


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 A2 crop factor

Sensor diagonal in mm = 11.00 mm
Crop factor =   43.27  = 3.93
11.00

RX100 crop factor

Sensor diagonal in mm = 15.86 mm
Crop factor =   43.27  = 2.73
15.86

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 A2 equivalent aperture

Crop factor = 3.93
Aperture = f2.8 - f3.5

35-mm equivalent aperture = (f2.8 - f3.5) × 3.93 = f11 - f13.8

RX100 equivalent aperture

Crop factor = 2.73
Aperture = f1.8 - f4.9

35-mm equivalent aperture = (f1.8 - f4.9) × 2.73 = f4.9 - f13.4

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