Minolta DiMAGE 7Hi vs. Canon PowerShot S2 IS
Comparison
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| Minolta DiMAGE 7Hi | Canon PowerShot S2 IS | ||||
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Megapixels
5.24
5.00
Max. image resolution
2560 x 1920
2592 x 1944
Sensor
Sensor type
CCD
CCD
Sensor size
2/3" (~ 8.8 x 6.6 mm)
1/2.5" (~ 5.75 x 4.32 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 »
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 »
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| 2.34 | : | 1 |
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| Minolta DiMAGE 7Hi | Canon PowerShot S2 IS | |
Surface area:
| 58.08 mm² | vs | 24.84 mm² |
Difference: 33.24 mm² (134%)
DiMAGE 7Hi sensor is approx. 2.34x bigger than S2 IS sensor.
Note: You are comparing cameras of different generations.
There is a 3 year gap between Minolta DiMAGE 7Hi (2002) and Canon S2 IS (2005).
All things being equal, newer sensor generations generally outperform the older.
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.
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.
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.
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: 6.12 µm² (123%)
A pixel on Minolta DiMAGE 7Hi sensor is approx. 123% bigger than a pixel on Canon S2 IS.
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.
Higher pixel density means smaller pixels and lower pixel density means larger pixels.
To learn about the accuracy of these numbers,
click here.
Specs
Minolta DiMAGE 7Hi
Canon S2 IS
Total megapixels
5.20
Effective megapixels
5.00
Optical zoom
7.1x
12x
Digital zoom
Yes
Yes
ISO sensitivity
100, 200, 400, 800
Auto, 50, 100, 200, 400
RAW
Manual focus
Normal focus range
60 cm
50 cm
Macro focus range
20 cm
10 cm
Focal length (35mm equiv.)
28 - 200 mm
36 - 432 mm
Aperture priority
Yes
Yes
Max. aperture
f2.8 - f3.5
f2.7 - f3.5
Metering
Centre weighted, Matrix, Spot
Centre weighted, Evaluative, Spot
Exposure compensation
±2 EV (in 1/3 EV steps)
±2 EV (in 1/3 EV steps)
Shutter priority
Yes
Yes
Min. shutter speed
Bulb+30 sec
15 sec
Max. shutter speed
1/4000 sec
1/3200 sec
Built-in flash
External flash
Viewfinder
Electronic
Electronic
White balance presets
7
6
Screen size
1.8"
1.8"
Screen resolution
122,000 dots
115,000 dots
Video capture
Max. video resolution
Storage types
CompactFlash type I, CompactFlash type II, Microdrive
Secure Digital
USB
USB 1.0
USB 2.0 (480 Mbit/sec)
HDMI
Wireless
GPS
Battery
Lithium-Ion (NP-200)
AA (4) batteries (NiMH recommended)
Weight
650 g
405 g
Dimensions
117 x 91 x 113 mm
113 x 78 x 75.5 mm
Year
2002
2005
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Diagonal
Diagonal is calculated by the use of Pythagorean theorem:
where w = sensor width and h = sensor height
| Diagonal = √ | w² + h² |
Minolta DiMAGE 7Hi diagonal
The diagonal of DiMAGE 7Hi 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
w = 8.80 mm
h = 6.60 mm
| Diagonal = √ | 8.80² + 6.60² | = 11.00 mm |
Canon S2 IS diagonal
The diagonal of S2 IS 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
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.
DiMAGE 7Hi sensor area
Width = 8.80 mm
Height = 6.60 mm
Surface area = 8.80 × 6.60 = 58.08 mm²
Height = 6.60 mm
Surface area = 8.80 × 6.60 = 58.08 mm²
S2 IS sensor area
Width = 5.75 mm
Height = 4.32 mm
Surface area = 5.75 × 4.32 = 24.84 mm²
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 |
DiMAGE 7Hi pixel pitch
Sensor width = 8.80 mm
Sensor resolution width = 2640 pixels
Sensor resolution width = 2640 pixels
| Pixel pitch = | 8.80 | × 1000 | = 3.33 µm |
| 2640 |
S2 IS pixel pitch
Sensor width = 5.75 mm
Sensor resolution width = 2579 pixels
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:
You could also divide sensor surface area with effective megapixels:
Pixel area = pixel pitch²
You could also divide sensor surface area with effective megapixels:
| Pixel area = | sensor surface area in mm² |
| effective megapixels |
DiMAGE 7Hi pixel area
Pixel pitch = 3.33 µm
Pixel area = 3.33² = 11.09 µm²
Pixel area = 3.33² = 11.09 µm²
S2 IS pixel area
Pixel pitch = 2.23 µm
Pixel area = 2.23² = 4.97 µm²
Pixel area = 2.23² = 4.97 µm²
Pixel density
Pixel density can be calculated with the following formula:
One could also use this 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 7Hi pixel density
Sensor resolution width = 2640 pixels
Sensor width = 0.88 cm
Pixel density = (2640 / 0.88)² / 1000000 = 9 MP/cm²
Sensor width = 0.88 cm
Pixel density = (2640 / 0.88)² / 1000000 = 9 MP/cm²
S2 IS pixel density
Sensor resolution width = 2579 pixels
Sensor width = 0.575 cm
Pixel density = (2579 / 0.575)² / 1000000 = 20.12 MP/cm²
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:
3. To get sensor resolution we then multiply X with the corresponding ratio:
Resolution horizontal: X × r
Resolution vertical: X
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 → |
|
Resolution horizontal: X × r
Resolution vertical: X
DiMAGE 7Hi sensor resolution
Sensor width = 8.80 mm
Sensor height = 6.60 mm
Effective megapixels = 5.24
Resolution horizontal: X × r = 1985 × 1.33 = 2640
Resolution vertical: X = 1985
Sensor resolution = 2640 x 1985
Sensor height = 6.60 mm
Effective megapixels = 5.24
| r = 8.80/6.60 = 1.33 |
|
Resolution vertical: X = 1985
Sensor resolution = 2640 x 1985
S2 IS sensor resolution
Sensor width = 5.75 mm
Sensor height = 4.32 mm
Effective megapixels = 5.00
Resolution horizontal: X × r = 1939 × 1.33 = 2579
Resolution vertical: X = 1939
Sensor resolution = 2579 x 1939
Sensor height = 4.32 mm
Effective megapixels = 5.00
| r = 5.75/4.32 = 1.33 |
|
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 |
DiMAGE 7Hi crop factor
Sensor diagonal in mm = 11.00 mm
| Crop factor = | 43.27 | = 3.93 |
| 11.00 |
S2 IS 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).
DiMAGE 7Hi equivalent aperture
Crop factor = 3.93
Aperture = f2.8 - f3.5
35-mm equivalent aperture = (f2.8 - f3.5) × 3.93 = f11 - f13.8
Aperture = f2.8 - f3.5
35-mm equivalent aperture = (f2.8 - f3.5) × 3.93 = f11 - f13.8
S2 IS equivalent aperture
Crop factor = 6.02
Aperture = f2.7 - f3.5
35-mm equivalent aperture = (f2.7 - f3.5) × 6.02 = f16.3 - f21.1
Aperture = f2.7 - f3.5
35-mm equivalent aperture = (f2.7 - f3.5) × 6.02 = f16.3 - f21.1
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