Minolta DiMAGE Xt vs. Minolta DiMAGE X

Comparison

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DiMAGE Xt image
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DiMAGE X image
Minolta DiMAGE Xt Minolta DiMAGE X
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Megapixels
3.34
2.10
Max. image resolution
2048 x 1536
1600 x 1200

Sensor

Sensor type
CCD
CCD
Sensor size
1/2.7" (~ 5.33 x 4 mm)
1/2.7" (~ 5.33 x 4 mm)
Sensor resolution
2108 x 1585
1672 x 1257
Diagonal
6.66 mm
6.66 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 : 1
(ratio)
Minolta DiMAGE Xt Minolta DiMAGE X
Surface area:
21.32 mm² vs 21.32 mm²
Difference: 0 mm² (0%)
DiMAGE Xt and DiMAGE X sensors are the same size.
Pixel pitch
2.53 µm
3.19 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: 0.66 µm (26%)
Pixel pitch of DiMAGE X is approx. 26% higher than pixel pitch of DiMAGE Xt.
Pixel area
6.4 µm²
10.18 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: 3.78 µm² (59%)
A pixel on Minolta DiMAGE X sensor is approx. 59% bigger than a pixel on Minolta DiMAGE Xt.
Pixel density
15.64 MP/cm²
9.84 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: 5.8 µm (59%)
Minolta DiMAGE Xt has approx. 59% higher pixel density than Minolta DiMAGE X.
To learn about the accuracy of these numbers, click here.



Specs

Minolta DiMAGE Xt
Minolta DiMAGE X
Crop factor
6.5
6.5
Total megapixels
Effective megapixels
Optical zoom
3x
3x
Digital zoom
Yes
Yes
ISO sensitivity
50, 100, 200, 400
Auto, 100, 200
RAW
Manual focus
Normal focus range
15 cm
25 cm
Macro focus range
15 cm
25 cm
Focal length (35mm equiv.)
37 - 111 mm
37 - 111 mm
Aperture priority
No
No
Max. aperture
f2.8 - f3.6
f2.8 - f3.6
Max. aperture (35mm equiv.)
f18.2 - f23.4
f18.2 - f23.4
Metering
256-segment Matrix, Spot
256-segment 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
2 sec
Max. shutter speed
1/1000 sec
1/1000 sec
Built-in flash
External flash
Viewfinder
Optical (tunnel)
Optical (tunnel)
White balance presets
6
6
Screen size
1.5"
1.5"
Screen resolution
110,000 dots
110,000 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-200)
Lithium-Ion (NP-200)
Weight
146 g
135 g
Dimensions
85 x 67 x 20 mm
85 x 72 x 20 mm
Year
2003
2002




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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

Minolta DiMAGE Xt diagonal

The diagonal of DiMAGE Xt 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

Minolta DiMAGE X diagonal

The diagonal of DiMAGE X 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


Surface area

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

DiMAGE Xt sensor area

Width = 5.33 mm
Height = 4.00 mm

Surface area = 5.33 × 4.00 = 21.32 mm²

DiMAGE X sensor area

Width = 5.33 mm
Height = 4.00 mm

Surface area = 5.33 × 4.00 = 21.32 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 Xt pixel pitch

Sensor width = 5.33 mm
Sensor resolution width = 2108 pixels
Pixel pitch =   5.33  × 1000  = 2.53 µm
2108

DiMAGE X pixel pitch

Sensor width = 5.33 mm
Sensor resolution width = 1672 pixels
Pixel pitch =   5.33  × 1000  = 3.19 µm
1672


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 Xt pixel area

Pixel pitch = 2.53 µm

Pixel area = 2.53² = 6.4 µm²

DiMAGE X pixel area

Pixel pitch = 3.19 µm

Pixel area = 3.19² = 10.18 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 Xt pixel density

Sensor resolution width = 2108 pixels
Sensor width = 0.533 cm

Pixel density = (2108 / 0.533)² / 1000000 = 15.64 MP/cm²

DiMAGE X pixel density

Sensor resolution width = 1672 pixels
Sensor width = 0.533 cm

Pixel density = (1672 / 0.533)² / 1000000 = 9.84 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

DiMAGE Xt sensor resolution

Sensor width = 5.33 mm
Sensor height = 4.00 mm
Effective megapixels = 3.34
r = 5.33/4.00 = 1.33
X =  3.34 × 1000000  = 1585
1.33
Resolution horizontal: X × r = 1585 × 1.33 = 2108
Resolution vertical: X = 1585

Sensor resolution = 2108 x 1585

DiMAGE X sensor resolution

Sensor width = 5.33 mm
Sensor height = 4.00 mm
Effective megapixels = 2.10
r = 5.33/4.00 = 1.33
X =  2.10 × 1000000  = 1257
1.33
Resolution horizontal: X × r = 1257 × 1.33 = 1672
Resolution vertical: X = 1257

Sensor resolution = 1672 x 1257


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 Xt crop factor

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

DiMAGE X crop factor

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

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 Xt 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

DiMAGE X 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

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