Contax SL300R T vs. Acer CE-5430

Comparison

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SL300R T image
vs
CE-5430 image
Contax SL300R T Acer CE-5430
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Megapixels
3.17
5.00
Max. image resolution
2048 x 1536
2592 x 1936

Sensor

Sensor type
CCD
CCD
Sensor size
1/2.7" (~ 5.33 x 4 mm)
1/2.5" (~ 5.75 x 4.32 mm)
Sensor resolution
2054 x 1544
2579 x 1939
Diagonal
6.66 mm
7.19 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 : 1.17
(ratio)
Contax SL300R T Acer CE-5430
Surface area:
21.32 mm² vs 24.84 mm²
Difference: 3.52 mm² (17%)
CE-5430 sensor is approx. 1.17x bigger than SL300R T sensor.
Note: You are comparing cameras of different generations. There is a 3 year gap between Contax SL300R T (2003) and Acer CE-5430 (2006). All things being equal, newer sensor generations generally outperform the older.
Pixel pitch
2.59 µm
2.23 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: 0.36 µm (16%)
Pixel pitch of SL300R T is approx. 16% higher than pixel pitch of CE-5430.
Pixel area
6.71 µm²
4.97 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: 1.74 µm² (35%)
A pixel on Contax SL300R T sensor is approx. 35% bigger than a pixel on Acer CE-5430.
Pixel density
14.85 MP/cm²
20.12 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: 5.27 µm (35%)
Acer CE-5430 has approx. 35% higher pixel density than Contax SL300R T.
To learn about the accuracy of these numbers, click here.



Specs

Contax SL300R T
Acer CE-5430
Crop factor
6.5
6.02
Total megapixels
Effective megapixels
Optical zoom
Yes
Yes
Digital zoom
Yes
Yes
ISO sensitivity
Auto, 100, 200, 400, 800
Auto, 64, 100, 200
RAW
Manual focus
Normal focus range
60 cm
40 cm
Macro focus range
20 cm
5 cm
Focal length (35mm equiv.)
38 - 115 mm
32 - 96 mm
Aperture priority
No
No
Max. aperture
f2.8 - f4.7
f2.8 - f4.8
Max. aperture (35mm equiv.)
f18.2 - f30.6
f16.9 - f28.9
Metering
Centre weighted, Matrix, Spot
Centre weighted
Exposure compensation
±2 EV (in 1/3 EV steps)
±2 EV (in 1/3 EV steps)
Shutter priority
No
No
Min. shutter speed
8 sec
1/2 sec
Max. shutter speed
1/2000 sec
1/1000 sec
Built-in flash
External flash
Viewfinder
Optical
Optical
White balance presets
6
5
Screen size
1.5"
2.36"
Screen resolution
118,000 dots
110,000 dots
Video capture
Max. video resolution
Storage types
MultiMedia, Secure Digital
Secure Digital
USB
USB 1.1
USB 1.1
HDMI
Wireless
GPS
Battery
Li-Ion
2x AA
Weight
125 g
130 g
Dimensions
100 x 62 x 16 mm
88.5 x 60 x 28 mm
Year
2003
2006




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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

Contax SL300R T diagonal

The diagonal of SL300R T 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

Acer CE-5430 diagonal

The diagonal of CE-5430 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


Surface area

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

SL300R T sensor area

Width = 5.33 mm
Height = 4.00 mm

Surface area = 5.33 × 4.00 = 21.32 mm²

CE-5430 sensor area

Width = 5.75 mm
Height = 4.32 mm

Surface area = 5.75 × 4.32 = 24.84 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

SL300R T pixel pitch

Sensor width = 5.33 mm
Sensor resolution width = 2054 pixels
Pixel pitch =   5.33  × 1000  = 2.59 µm
2054

CE-5430 pixel pitch

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


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

SL300R T pixel area

Pixel pitch = 2.59 µm

Pixel area = 2.59² = 6.71 µm²

CE-5430 pixel area

Pixel pitch = 2.23 µm

Pixel area = 2.23² = 4.97 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

SL300R T pixel density

Sensor resolution width = 2054 pixels
Sensor width = 0.533 cm

Pixel density = (2054 / 0.533)² / 1000000 = 14.85 MP/cm²

CE-5430 pixel density

Sensor resolution width = 2579 pixels
Sensor width = 0.575 cm

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

SL300R T sensor resolution

Sensor width = 5.33 mm
Sensor height = 4.00 mm
Effective megapixels = 3.17
r = 5.33/4.00 = 1.33
X =  3.17 × 1000000  = 1544
1.33
Resolution horizontal: X × r = 1544 × 1.33 = 2054
Resolution vertical: X = 1544

Sensor resolution = 2054 x 1544

CE-5430 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


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


SL300R T crop factor

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

CE-5430 crop factor

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

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).

SL300R T equivalent aperture

Crop factor = 6.5
Aperture = f2.8 - f4.7

35-mm equivalent aperture = (f2.8 - f4.7) × 6.5 = f18.2 - f30.6

CE-5430 equivalent aperture

Crop factor = 6.02
Aperture = f2.8 - f4.8

35-mm equivalent aperture = (f2.8 - f4.8) × 6.02 = f16.9 - f28.9

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