Yakumo Mega Image 811x vs. Canon PowerShot G7 X Mark III
Comparison
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Yakumo Mega Image 811x | Canon PowerShot G7 X Mark III | ||||
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Megapixels
8.00
20.10
Max. image resolution
3296 x 2472
5472 x 3648
Sensor
Sensor type
CCD
CMOS
Sensor size
1/1.8" (~ 7.11 x 5.33 mm)
13.2 x 8.8 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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Yakumo Mega Image 811x | Canon PowerShot G7 X Mark III |
Surface area:
37.90 mm² | vs | 116.16 mm² |
Difference: 78.26 mm² (206%)
G7 X Mark III sensor is approx. 3.06x bigger than 811x sensor.
Note: You are comparing sensors of vastly different generations.
There is a gap of 13 years between Yakumo 811x (2006) and
Canon G7 X Mark III (2019).
Thirteen years is a huge amount of time,
technology wise, resulting in newer sensor being much more
efficient than the older one.
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: 1.01 µm² (21%)
A pixel on Canon G7 X Mark III sensor is approx. 21% bigger than a pixel on Yakumo 811x.
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
Yakumo 811x
Canon G7 X Mark III
Total megapixels
20.90
Effective megapixels
20.10
Optical zoom
Yes
4.2x
Digital zoom
Yes
Yes
ISO sensitivity
Auto, 100, 200, 400
Auto, 125-12800 (extends to 25600)
RAW
Manual focus
Normal focus range
40 cm
5 cm
Macro focus range
5 cm
Focal length (35mm equiv.)
38 - 114 mm
24 - 100 mm
Aperture priority
No
Yes
Max. aperture
f2.8 - f5.2
f1.8 - f2.8
Metering
Centre weighted, Multi-segment, Spot
Multi, Center-weighted, Spot
Exposure compensation
±2 EV (in 1/3 EV steps)
±3 EV (in 1/3 EV steps)
Shutter priority
No
Yes
Min. shutter speed
2 sec
30 sec
Max. shutter speed
1/2000 sec
1/2000 sec
Built-in flash
External flash
Viewfinder
Optical
None
White balance presets
6
6
Screen size
2"
3"
Screen resolution
1,040,000 dots
Video capture
Max. video resolution
3840x2160 (30p/25p)
Storage types
MultiMedia, Secure Digital
SD/SDHC/SDXC
USB
USB 1.1
USB 3.0 (5 GBit/sec)
HDMI
Wireless
GPS
Battery
Li-Ion
NB-13L lithium-ion battery
Weight
304 g
Dimensions
105.5 x 60.9 x 41.4 mm
Year
2006
2019
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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 |
Yakumo 811x diagonal
The diagonal of 811x 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 G7 X Mark III diagonal
w = 13.20 mm
h = 8.80 mm
h = 8.80 mm
Diagonal = √ | 13.20² + 8.80² | = 15.86 mm |
Surface area
Surface area is calculated by multiplying the width and the height of a sensor.
811x 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
G7 X Mark III sensor area
Width = 13.20 mm
Height = 8.80 mm
Surface area = 13.20 × 8.80 = 116.16 mm²
Height = 8.80 mm
Surface area = 13.20 × 8.80 = 116.16 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 |
811x pixel pitch
Sensor width = 7.11 mm
Sensor resolution width = 3262 pixels
Sensor resolution width = 3262 pixels
Pixel pitch = | 7.11 | × 1000 | = 2.18 µm |
3262 |
G7 X Mark III pixel pitch
Sensor width = 13.20 mm
Sensor resolution width = 5492 pixels
Sensor resolution width = 5492 pixels
Pixel pitch = | 13.20 | × 1000 | = 2.4 µm |
5492 |
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 |
811x pixel area
Pixel pitch = 2.18 µm
Pixel area = 2.18² = 4.75 µm²
Pixel area = 2.18² = 4.75 µm²
G7 X Mark III pixel area
Pixel pitch = 2.4 µm
Pixel area = 2.4² = 5.76 µm²
Pixel area = 2.4² = 5.76 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 |
811x pixel density
Sensor resolution width = 3262 pixels
Sensor width = 0.711 cm
Pixel density = (3262 / 0.711)² / 1000000 = 21.05 MP/cm²
Sensor width = 0.711 cm
Pixel density = (3262 / 0.711)² / 1000000 = 21.05 MP/cm²
G7 X Mark III pixel density
Sensor resolution width = 5492 pixels
Sensor width = 1.32 cm
Pixel density = (5492 / 1.32)² / 1000000 = 17.31 MP/cm²
Sensor width = 1.32 cm
Pixel density = (5492 / 1.32)² / 1000000 = 17.31 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 → |
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Resolution horizontal: X × r
Resolution vertical: X
811x sensor resolution
Sensor width = 7.11 mm
Sensor height = 5.33 mm
Effective megapixels = 8.00
Resolution horizontal: X × r = 2453 × 1.33 = 3262
Resolution vertical: X = 2453
Sensor resolution = 3262 x 2453
Sensor height = 5.33 mm
Effective megapixels = 8.00
r = 7.11/5.33 = 1.33 |
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Resolution vertical: X = 2453
Sensor resolution = 3262 x 2453
G7 X Mark III sensor resolution
Sensor width = 13.20 mm
Sensor height = 8.80 mm
Effective megapixels = 20.10
Resolution horizontal: X × r = 3661 × 1.5 = 5492
Resolution vertical: X = 3661
Sensor resolution = 5492 x 3661
Sensor height = 8.80 mm
Effective megapixels = 20.10
r = 13.20/8.80 = 1.5 |
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Resolution vertical: X = 3661
Sensor resolution = 5492 x 3661
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 |
811x crop factor
Sensor diagonal in mm = 8.89 mm
Crop factor = | 43.27 | = 4.87 |
8.89 |
G7 X Mark III crop factor
Sensor diagonal in mm = 15.86 mm
Crop factor = | 43.27 | = 2.73 |
15.86 |
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).
811x equivalent aperture
Crop factor = 4.87
Aperture = f2.8 - f5.2
35-mm equivalent aperture = (f2.8 - f5.2) × 4.87 = f13.6 - f25.3
Aperture = f2.8 - f5.2
35-mm equivalent aperture = (f2.8 - f5.2) × 4.87 = f13.6 - f25.3
G7 X Mark III equivalent aperture
Crop factor = 2.73
Aperture = f1.8 - f2.8
35-mm equivalent aperture = (f1.8 - f2.8) × 2.73 = f4.9 - f7.6
Aperture = f1.8 - f2.8
35-mm equivalent aperture = (f1.8 - f2.8) × 2.73 = f4.9 - f7.6
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