Olympus C-4000 Zoom vs. Canon PowerShot G3
Comparison
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Megapixels
3.90
3.90
Max. image resolution
2288 x 1712
2272 x 1740
Sensor
Sensor type
CCD
CCD
Sensor size
1/1.8" (~ 7.11 x 5.33 mm)
1/1.8" (~ 7.11 x 5.33 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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| Olympus C-4000 Zoom | Canon PowerShot G3 | |
Surface area:
| 37.90 mm² | vs | 37.90 mm² |
Difference: 0 mm² (0%)
C-4000 Zoom and G3 sensors are the same size.
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: 0 µm² (0%)
Olympus C-4000 Zoom and Canon G3 have the same pixel area.
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
Olympus C-4000 Zoom
Canon G3
Total megapixels
4.10
4.10
Effective megapixels
3.90
3.90
Optical zoom
3x
4x
Digital zoom
Yes
Yes
ISO sensitivity
100, 200, 400
50, 100, 200, 400
RAW
Manual focus
Normal focus range
80 cm
50 cm
Macro focus range
2 cm
5 cm
Focal length (35mm equiv.)
32 - 96 mm
35 - 140 mm
Aperture priority
Yes
Yes
Max. aperture
f2.8 - f2.8
f2.0 - f3.0
Metering
ESPi Digital, Multi Spot, 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
16 sec
15 sec
Max. shutter speed
1/1000 sec
1/2000 sec
Built-in flash
External flash
Viewfinder
Optical (tunnel)
Optical (tunnel)
White balance presets
7
6
Screen size
1.8"
1.8"
Screen resolution
110,000 dots
120,000 dots
Video capture
Max. video resolution
Storage types
SmartMedia
CompactFlash type I, CompactFlash type II, Microdrive
USB
USB 1.0
USB 1.0
HDMI
Wireless
GPS
Battery
AA (4) batteries (NiMH recommended)
Canon Lithium-Ion
Weight
415 g
410 g
Dimensions
110 x 77 x 67 mm
121 x 73.9 x 69.9 mm
Year
2002
2002
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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 |
Olympus C-4000 Zoom diagonal
The diagonal of C-4000 Zoom sensor is not 1/1.8 or 0.56" (14.1 mm) as you might expect, but approximately two thirds of
that value - 8.89 mm. If you want to know why, see
sensor sizes.
w = 7.11 mm
h = 5.33 mm
w = 7.11 mm
h = 5.33 mm
| Diagonal = √ | 7.11² + 5.33² | = 8.89 mm |
Canon G3 diagonal
The diagonal of G3 sensor is not 1/1.8 or 0.56" (14.1 mm) as you might expect, but approximately two thirds of
that value - 8.89 mm. If you want to know why, see
sensor sizes.
w = 7.11 mm
h = 5.33 mm
w = 7.11 mm
h = 5.33 mm
| Diagonal = √ | 7.11² + 5.33² | = 8.89 mm |
Surface area
Surface area is calculated by multiplying the width and the height of a sensor.
C-4000 Zoom sensor area
Width = 7.11 mm
Height = 5.33 mm
Surface area = 7.11 × 5.33 = 37.90 mm²
Height = 5.33 mm
Surface area = 7.11 × 5.33 = 37.90 mm²
G3 sensor area
Width = 7.11 mm
Height = 5.33 mm
Surface area = 7.11 × 5.33 = 37.90 mm²
Height = 5.33 mm
Surface area = 7.11 × 5.33 = 37.90 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 |
C-4000 Zoom pixel pitch
Sensor width = 7.11 mm
Sensor resolution width = 2277 pixels
Sensor resolution width = 2277 pixels
| Pixel pitch = | 7.11 | × 1000 | = 3.12 µm |
| 2277 |
G3 pixel pitch
Sensor width = 7.11 mm
Sensor resolution width = 2277 pixels
Sensor resolution width = 2277 pixels
| Pixel pitch = | 7.11 | × 1000 | = 3.12 µm |
| 2277 |
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 |
C-4000 Zoom pixel area
Pixel pitch = 3.12 µm
Pixel area = 3.12² = 9.73 µm²
Pixel area = 3.12² = 9.73 µm²
G3 pixel area
Pixel pitch = 3.12 µm
Pixel area = 3.12² = 9.73 µm²
Pixel area = 3.12² = 9.73 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 |
C-4000 Zoom pixel density
Sensor resolution width = 2277 pixels
Sensor width = 0.711 cm
Pixel density = (2277 / 0.711)² / 1000000 = 10.26 MP/cm²
Sensor width = 0.711 cm
Pixel density = (2277 / 0.711)² / 1000000 = 10.26 MP/cm²
G3 pixel density
Sensor resolution width = 2277 pixels
Sensor width = 0.711 cm
Pixel density = (2277 / 0.711)² / 1000000 = 10.26 MP/cm²
Sensor width = 0.711 cm
Pixel density = (2277 / 0.711)² / 1000000 = 10.26 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
C-4000 Zoom sensor resolution
Sensor width = 7.11 mm
Sensor height = 5.33 mm
Effective megapixels = 3.90
Resolution horizontal: X × r = 1712 × 1.33 = 2277
Resolution vertical: X = 1712
Sensor resolution = 2277 x 1712
Sensor height = 5.33 mm
Effective megapixels = 3.90
| r = 7.11/5.33 = 1.33 |
|
Resolution vertical: X = 1712
Sensor resolution = 2277 x 1712
G3 sensor resolution
Sensor width = 7.11 mm
Sensor height = 5.33 mm
Effective megapixels = 3.90
Resolution horizontal: X × r = 1712 × 1.33 = 2277
Resolution vertical: X = 1712
Sensor resolution = 2277 x 1712
Sensor height = 5.33 mm
Effective megapixels = 3.90
| r = 7.11/5.33 = 1.33 |
|
Resolution vertical: X = 1712
Sensor resolution = 2277 x 1712
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 |
C-4000 Zoom crop factor
Sensor diagonal in mm = 8.89 mm
| Crop factor = | 43.27 | = 4.87 |
| 8.89 |
G3 crop factor
Sensor diagonal in mm = 8.89 mm
| Crop factor = | 43.27 | = 4.87 |
| 8.89 |
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).
C-4000 Zoom equivalent aperture
Crop factor = 4.87
Aperture = f2.8 - f2.8
35-mm equivalent aperture = (f2.8 - f2.8) × 4.87 = f13.6 - f13.6
Aperture = f2.8 - f2.8
35-mm equivalent aperture = (f2.8 - f2.8) × 4.87 = f13.6 - f13.6
G3 equivalent aperture
Crop factor = 4.87
Aperture = f2.0 - f3.0
35-mm equivalent aperture = (f2.0 - f3.0) × 4.87 = f9.7 - f14.6
Aperture = f2.0 - f3.0
35-mm equivalent aperture = (f2.0 - f3.0) × 4.87 = f9.7 - f14.6
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