Panasonic Lumix DC-GH7 vs. Canon EOS 450D
Comparison
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| Panasonic Lumix DC-GH7 | Canon EOS 450D | ||||
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Megapixels
25.20
12.20
Max. image resolution
5776 x 4336
4272 x 2848
Sensor
Sensor type
CMOS
CMOS
Sensor size
Four Thirds (17.3 x 13 mm)
22.2 x 14.8 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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| 1 | : | 1.46 |
| (ratio) | ||
| Panasonic Lumix DC-GH7 | Canon EOS 450D | |
Surface area:
| 224.90 mm² | vs | 328.56 mm² |
Difference: 103.66 mm² (46%)
450D sensor is approx. 1.46x bigger than Lumix DC-GH7 sensor.
Note: You are comparing sensors of vastly different generations.
There is a gap of 16 years between Panasonic Lumix DC-GH7 (2024) and
Canon 450D (2008).
Sixteen 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: 18 µm² (201%)
A pixel on Canon 450D sensor is approx. 201% bigger than a pixel on Panasonic Lumix DC-GH7.
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
Panasonic Lumix DC-GH7
Canon 450D
Total megapixels
26.50
12.40
Effective megapixels
25.20
12.20
Optical zoom
Digital zoom
Yes
No
ISO sensitivity
Auto, 100-25600 (extends to 50)
Auto, 100, 200, 400, 800, 1600
RAW
Manual focus
Normal focus range
Macro focus range
Focal length (35mm equiv.)
Aperture priority
Yes
Yes
Max. aperture
Metering
Multi, Center-weighted, Highlight-weighted, Spot
Centre weighted, Evaluative, Spot
Exposure compensation
±5 EV (in 1/3 EV steps)
±2 EV (in 1/3 EV, 1/2 EV steps)
Shutter priority
Yes
Yes
Min. shutter speed
60 sec
Bulb+30 sec
Max. shutter speed
1/32000 sec
1/4000 sec
Built-in flash
External flash
Viewfinder
Electronic
Optical (pentamirror)
White balance presets
6
6
Screen size
3"
3"
Screen resolution
1,840,000 dots
230,000 dots
Video capture
Max. video resolution
5760x4320 (30p/25p/24p)
Storage types
SD/SDHC/SDXC, CFexpress
SDHC, Secure Digital
USB
USB 3.2 (10 GBit/sec)
USB 2.0 (480 Mbit/sec)
HDMI
Wireless
GPS
Battery
DMW-BLK22 Rechargeable Lithium-Ion battery
NB-4L Li-ion battery
Weight
805 g
524 g
Dimensions
138.4 x 100.3 x 99.6 mm
129 x 98 x 62 mm
Year
2024
2008
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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 |
Panasonic Lumix DC-GH7 diagonal
w = 17.30 mm
h = 13.00 mm
h = 13.00 mm
| Diagonal = √ | 17.30² + 13.00² | = 21.64 mm |
Canon 450D diagonal
w = 22.20 mm
h = 14.80 mm
h = 14.80 mm
| Diagonal = √ | 22.20² + 14.80² | = 26.68 mm |
Surface area
Surface area is calculated by multiplying the width and the height of a sensor.
Lumix DC-GH7 sensor area
Width = 17.30 mm
Height = 13.00 mm
Surface area = 17.30 × 13.00 = 224.90 mm²
Height = 13.00 mm
Surface area = 17.30 × 13.00 = 224.90 mm²
450D sensor area
Width = 22.20 mm
Height = 14.80 mm
Surface area = 22.20 × 14.80 = 328.56 mm²
Height = 14.80 mm
Surface area = 22.20 × 14.80 = 328.56 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 |
Lumix DC-GH7 pixel pitch
Sensor width = 17.30 mm
Sensor resolution width = 5789 pixels
Sensor resolution width = 5789 pixels
| Pixel pitch = | 17.30 | × 1000 | = 2.99 µm |
| 5789 |
450D pixel pitch
Sensor width = 22.20 mm
Sensor resolution width = 4278 pixels
Sensor resolution width = 4278 pixels
| Pixel pitch = | 22.20 | × 1000 | = 5.19 µm |
| 4278 |
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 |
Lumix DC-GH7 pixel area
Pixel pitch = 2.99 µm
Pixel area = 2.99² = 8.94 µm²
Pixel area = 2.99² = 8.94 µm²
450D pixel area
Pixel pitch = 5.19 µm
Pixel area = 5.19² = 26.94 µm²
Pixel area = 5.19² = 26.94 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 |
Lumix DC-GH7 pixel density
Sensor resolution width = 5789 pixels
Sensor width = 1.73 cm
Pixel density = (5789 / 1.73)² / 1000000 = 11.2 MP/cm²
Sensor width = 1.73 cm
Pixel density = (5789 / 1.73)² / 1000000 = 11.2 MP/cm²
450D pixel density
Sensor resolution width = 4278 pixels
Sensor width = 2.22 cm
Pixel density = (4278 / 2.22)² / 1000000 = 3.71 MP/cm²
Sensor width = 2.22 cm
Pixel density = (4278 / 2.22)² / 1000000 = 3.71 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
Lumix DC-GH7 sensor resolution
Sensor width = 17.30 mm
Sensor height = 13.00 mm
Effective megapixels = 25.20
Resolution horizontal: X × r = 4353 × 1.33 = 5789
Resolution vertical: X = 4353
Sensor resolution = 5789 x 4353
Sensor height = 13.00 mm
Effective megapixels = 25.20
| r = 17.30/13.00 = 1.33 |
|
Resolution vertical: X = 4353
Sensor resolution = 5789 x 4353
450D sensor resolution
Sensor width = 22.20 mm
Sensor height = 14.80 mm
Effective megapixels = 12.20
Resolution horizontal: X × r = 2852 × 1.5 = 4278
Resolution vertical: X = 2852
Sensor resolution = 4278 x 2852
Sensor height = 14.80 mm
Effective megapixels = 12.20
| r = 22.20/14.80 = 1.5 |
|
Resolution vertical: X = 2852
Sensor resolution = 4278 x 2852
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 |
Lumix DC-GH7 crop factor
Sensor diagonal in mm = 21.64 mm
| Crop factor = | 43.27 | = 2 |
| 21.64 |
450D crop factor
Sensor diagonal in mm = 26.68 mm
| Crop factor = | 43.27 | = 1.62 |
| 26.68 |
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).
Lumix DC-GH7 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
Panasonic Lumix DC-GH7, take the aperture of the lens
you're using and multiply it with crop factor.
Crop factor for Panasonic Lumix DC-GH7 is 2
Crop factor for Panasonic Lumix DC-GH7 is 2
450D 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 450D, take the aperture of the lens
you're using and multiply it with crop factor.
Crop factor for Canon 450D is 1.62
Crop factor for Canon 450D is 1.62
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If your screen (phone, tablet, or monitor) is not in diagonal, then the actual size of a sensor won't be shown correctly.