Konica-Minolta DiMAGE Xg vs. Canon EOS 450D

Comparison

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DiMAGE Xg image
vs
EOS 450D image
Konica-Minolta DiMAGE Xg Canon EOS 450D
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Megapixels
3.10
12.20
Max. image resolution
2048 x 1536
4272 x 2848

Sensor

Sensor type
CCD
CMOS
Sensor size
1/2.7" (~ 5.33 x 4 mm)
22.2 x 14.8 mm
Sensor resolution
2031 x 1527
4278 x 2852
Diagonal
6.66 mm
26.68 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 : 15.41
(ratio)
Konica-Minolta DiMAGE Xg Canon EOS 450D
Surface area:
21.32 mm² vs 328.56 mm²
Difference: 307.24 mm² (1441%)
450D sensor is approx. 15.41x bigger than DiMAGE Xg sensor.
Note: You are comparing cameras of different generations. There is a 4 year gap between Konica-Minolta DiMAGE Xg (2004) and Canon 450D (2008). All things being equal, newer sensor generations generally outperform the older.
Pixel pitch
2.62 µm
5.19 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: 2.57 µm (98%)
Pixel pitch of 450D is approx. 98% higher than pixel pitch of DiMAGE Xg.
Pixel area
6.86 µm²
26.94 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: 20.08 µm² (293%)
A pixel on Canon 450D sensor is approx. 293% bigger than a pixel on Konica-Minolta DiMAGE Xg.
Pixel density
14.52 MP/cm²
3.71 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: 10.81 µm (291%)
Konica-Minolta DiMAGE Xg has approx. 291% higher pixel density than Canon 450D.
To learn about the accuracy of these numbers, click here.



Specs

Konica-Minolta DiMAGE Xg
Canon 450D
Crop factor
6.5
1.62
Total megapixels
12.40
Effective megapixels
12.20
Optical zoom
3.1x
Digital zoom
Yes
No
ISO sensitivity
Auto, 50, 100, 200, 400
Auto, 100, 200, 400, 800, 1600
RAW
Manual focus
Normal focus range
15 cm
Macro focus range
15 cm
Focal length (35mm equiv.)
37 - 115 mm
Aperture priority
No
Yes
Max. aperture
f2.8 - f3.6
Max. aperture (35mm equiv.)
f18.2 - f23.4
n/a
Metering
Centre weighted, Evaluative, Spot
Exposure compensation
±2 EV (in 1/3 EV steps)
±2 EV (in 1/3 EV, 1/2 EV steps)
Shutter priority
No
Yes
Min. shutter speed
4 sec
Bulb+30 sec
Max. shutter speed
1/1000 sec
1/4000 sec
Built-in flash
External flash
Viewfinder
Optical (tunnel)
Optical (pentamirror)
White balance presets
5
6
Screen size
1.6"
3"
Screen resolution
85,000 dots
230,000 dots
Video capture
Max. video resolution
Storage types
SD/MMC card
SDHC, Secure Digital
USB
USB 1.0
USB 2.0 (480 Mbit/sec)
HDMI
Wireless
GPS
Battery
Lithium-Ion (NP-200)
NB-4L Li-ion battery
Weight
155 g
524 g
Dimensions
86 x 67 x 20 mm
129 x 98 x 62 mm
Year
2004
2008




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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 Xg diagonal

The diagonal of DiMAGE Xg sensor is not 1/2.7 or 0.37" (9.4 mm) as you might expect, but approximately two thirds of that value - 6.66 mm. If you want to know why, see sensor sizes.

w = 5.33 mm
h = 4.00 mm
Diagonal =  5.33² + 4.00²   = 6.66 mm

Canon 450D diagonal

w = 22.20 mm
h = 14.80 mm
Diagonal =  22.20² + 14.80²   = 26.68 mm


Surface area

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

DiMAGE Xg sensor area

Width = 5.33 mm
Height = 4.00 mm

Surface area = 5.33 × 4.00 = 21.32 mm²

450D sensor area

Width = 22.20 mm
Height = 14.80 mm

Surface area = 22.20 × 14.80 = 328.56 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 Xg pixel pitch

Sensor width = 5.33 mm
Sensor resolution width = 2031 pixels
Pixel pitch =   5.33  × 1000  = 2.62 µm
2031

450D pixel pitch

Sensor width = 22.20 mm
Sensor resolution width = 4278 pixels
Pixel pitch =   22.20  × 1000  = 5.19 µm
4278


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 Xg pixel area

Pixel pitch = 2.62 µm

Pixel area = 2.62² = 6.86 µm²

450D pixel area

Pixel pitch = 5.19 µm

Pixel area = 5.19² = 26.94 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 Xg pixel density

Sensor resolution width = 2031 pixels
Sensor width = 0.533 cm

Pixel density = (2031 / 0.533)² / 1000000 = 14.52 MP/cm²

450D pixel density

Sensor resolution width = 4278 pixels
Sensor width = 2.22 cm

Pixel density = (4278 / 2.22)² / 1000000 = 3.71 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 Xg sensor resolution

Sensor width = 5.33 mm
Sensor height = 4.00 mm
Effective megapixels = 3.10
r = 5.33/4.00 = 1.33
X =  3.10 × 1000000  = 1527
1.33
Resolution horizontal: X × r = 1527 × 1.33 = 2031
Resolution vertical: X = 1527

Sensor resolution = 2031 x 1527

450D sensor resolution

Sensor width = 22.20 mm
Sensor height = 14.80 mm
Effective megapixels = 12.20
r = 22.20/14.80 = 1.5
X =  12.20 × 1000000  = 2852
1.5
Resolution horizontal: X × r = 2852 × 1.5 = 4278
Resolution vertical: X = 2852

Sensor resolution = 4278 x 2852


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 Xg crop factor

Sensor diagonal in mm = 6.66 mm
Crop factor =   43.27  = 6.5
6.66

450D crop factor

Sensor diagonal in mm = 26.68 mm
Crop factor =   43.27  = 1.62
26.68

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 Xg equivalent aperture

Crop factor = 6.5
Aperture = f2.8 - f3.6

35-mm equivalent aperture = (f2.8 - f3.6) × 6.5 = f18.2 - f23.4

450D 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 Canon 450D, take the aperture of the lens you're using and multiply it with crop factor.

Crop factor for Canon 450D is 1.62

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