Minolta DiMAGE G400 vs. Canon EOS M
Comparison
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| Minolta DiMAGE G400 | Canon EOS M | ||||
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Megapixels
4.23
18.00
Max. image resolution
2272 x 1704
5184 x 3456
Sensor
Sensor type
CCD
CMOS
Sensor size
1/2.5" (~ 5.75 x 4.32 mm)
22.3 x 14.9 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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| 1 | : | 13.38 |
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| Minolta DiMAGE G400 | Canon EOS M | |
Surface area:
| 24.84 mm² | vs | 332.27 mm² |
Difference: 307.43 mm² (1238%)
M sensor is approx. 13.38x bigger than DiMAGE G400 sensor.
Note: You are comparing sensors of very different generations.
There is a gap of 9 years between Minolta DiMAGE G400 (2003) and Canon M (2012).
Nine years is a lot of time in terms
of technology, meaning newer sensors are overall much more
efficient than the older ones.
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: 12.5 µm² (212%)
A pixel on Canon M sensor is approx. 212% bigger than a pixel on Minolta DiMAGE G400.
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 G400
Canon M
Total megapixels
18.50
Effective megapixels
18.00
Optical zoom
3x
Digital zoom
Yes
No
ISO sensitivity
Auto, 50, 100, 200, 400
Auto, 100, 200, 400, 800, 1600, 3200, 6400, 12800 (25600 with boost)
RAW
Manual focus
Normal focus range
50 cm
Macro focus range
5 cm
Focal length (35mm equiv.)
34 - 101 mm
Aperture priority
Yes
Yes
Max. aperture
f2.8 - f4.9
Metering
Centre weighted, Spot
Multi, Center-weighted, Spot, Partial
Exposure compensation
±2 EV (in 1/3 EV steps)
±3 EV (in 1/3 EV, 1/2 EV steps)
Shutter priority
No
Yes
Min. shutter speed
15 sec
60 sec
Max. shutter speed
1/2000 sec
1/4000 sec
Built-in flash
External flash
Viewfinder
Optical (tunnel)
None
White balance presets
6
6
Screen size
1.5"
3"
Screen resolution
76,800 dots
1,040,000 dots
Video capture
Max. video resolution
Storage types
Memory Stick, MultiMedia, Secure Digital
SD/SDHC/SDXC
USB
USB 1.0
USB 2.0 (480 Mbit/sec)
HDMI
Wireless
GPS
Battery
Lithium-Ion rechargeable
Lithium-Ion LP-E12 rechargeable battery
Weight
145 g
298 g
Dimensions
94 x 55 x 23 mm
109 x 66 x 32 mm
Year
2003
2012
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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 G400 diagonal
The diagonal of DiMAGE G400 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 |
Canon M diagonal
w = 22.30 mm
h = 14.90 mm
h = 14.90 mm
| Diagonal = √ | 22.30² + 14.90² | = 26.82 mm |
Surface area
Surface area is calculated by multiplying the width and the height of a sensor.
DiMAGE G400 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
M sensor area
Width = 22.30 mm
Height = 14.90 mm
Surface area = 22.30 × 14.90 = 332.27 mm²
Height = 14.90 mm
Surface area = 22.30 × 14.90 = 332.27 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 G400 pixel pitch
Sensor width = 5.75 mm
Sensor resolution width = 2371 pixels
Sensor resolution width = 2371 pixels
| Pixel pitch = | 5.75 | × 1000 | = 2.43 µm |
| 2371 |
M pixel pitch
Sensor width = 22.30 mm
Sensor resolution width = 5196 pixels
Sensor resolution width = 5196 pixels
| Pixel pitch = | 22.30 | × 1000 | = 4.29 µm |
| 5196 |
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 G400 pixel area
Pixel pitch = 2.43 µm
Pixel area = 2.43² = 5.9 µm²
Pixel area = 2.43² = 5.9 µm²
M pixel area
Pixel pitch = 4.29 µm
Pixel area = 4.29² = 18.4 µm²
Pixel area = 4.29² = 18.4 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 G400 pixel density
Sensor resolution width = 2371 pixels
Sensor width = 0.575 cm
Pixel density = (2371 / 0.575)² / 1000000 = 17 MP/cm²
Sensor width = 0.575 cm
Pixel density = (2371 / 0.575)² / 1000000 = 17 MP/cm²
M pixel density
Sensor resolution width = 5196 pixels
Sensor width = 2.23 cm
Pixel density = (5196 / 2.23)² / 1000000 = 5.43 MP/cm²
Sensor width = 2.23 cm
Pixel density = (5196 / 2.23)² / 1000000 = 5.43 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 G400 sensor resolution
Sensor width = 5.75 mm
Sensor height = 4.32 mm
Effective megapixels = 4.23
Resolution horizontal: X × r = 1783 × 1.33 = 2371
Resolution vertical: X = 1783
Sensor resolution = 2371 x 1783
Sensor height = 4.32 mm
Effective megapixels = 4.23
| r = 5.75/4.32 = 1.33 |
|
Resolution vertical: X = 1783
Sensor resolution = 2371 x 1783
M sensor resolution
Sensor width = 22.30 mm
Sensor height = 14.90 mm
Effective megapixels = 18.00
Resolution horizontal: X × r = 3464 × 1.5 = 5196
Resolution vertical: X = 3464
Sensor resolution = 5196 x 3464
Sensor height = 14.90 mm
Effective megapixels = 18.00
| r = 22.30/14.90 = 1.5 |
|
Resolution vertical: X = 3464
Sensor resolution = 5196 x 3464
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 G400 crop factor
Sensor diagonal in mm = 7.19 mm
| Crop factor = | 43.27 | = 6.02 |
| 7.19 |
M crop factor
Sensor diagonal in mm = 26.82 mm
| Crop factor = | 43.27 | = 1.61 |
| 26.82 |
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 G400 equivalent aperture
Crop factor = 6.02
Aperture = f2.8 - f4.9
35-mm equivalent aperture = (f2.8 - f4.9) × 6.02 = f16.9 - f29.5
Aperture = f2.8 - f4.9
35-mm equivalent aperture = (f2.8 - f4.9) × 6.02 = f16.9 - f29.5
M equivalent aperture
Aperture is a lens characteristic, so it's calculated only for
fixed lens cameras. If you want to know the equivalent aperture for
Canon M, take the aperture of the lens
you're using and multiply it with crop factor.
Crop factor for Canon M is 1.61
Crop factor for Canon M is 1.61
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