Pentax Q10 vs. Canon EOS Rebel T2i
Comparison
| change cameras » | |||||
|
vs |
|
|||
| Pentax Q10 | Canon EOS Rebel T2i | ||||
| check price » | check price » | ||||
Megapixels
12.40
18.00
Max. image resolution
4000 x 3000
5184 x 3456
Sensor
Sensor type
CMOS
CMOS
Sensor size
1/2.3" (~ 6.16 x 4.62 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 »
|
|
vs |
|
| 1 | : | 11.67 |
| (ratio) | ||
| Pentax Q10 | Canon EOS Rebel T2i | |
Surface area:
| 28.46 mm² | vs | 332.27 mm² |
Difference: 303.81 mm² (1067%)
Rebel T2i sensor is approx. 11.67x bigger than Q10 sensor.
Note: You are comparing cameras of different generations.
There is a 2 year gap between Pentax Q10 (2012) and Canon Rebel T2i (2010).
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: 16.09 µm² (697%)
A pixel on Canon Rebel T2i sensor is approx. 697% bigger than a pixel on Pentax Q10.
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
Pentax Q10
Canon Rebel T2i
Total megapixels
12.70
18.70
Effective megapixels
12.40
18.00
Optical zoom
Digital zoom
No
No
ISO sensitivity
Auto, 100 - 6400
Auto, 100, 200, 400, 800, 1600, 3200, 6400, 12800 (with boost)
RAW
Manual focus
Normal focus range
Macro focus range
Focal length (35mm equiv.)
Aperture priority
Yes
Yes
Max. aperture
Metering
Multi, Center-weighted, Spot
63-zone Evaluative, Centre weighted, Evaluative, Spot
Exposure compensation
±3 EV (in 1/3 EV steps)
±5 EV (in 1/3 EV, 1/2 EV steps)
Shutter priority
Yes
Yes
Min. shutter speed
30 sec
30 sec
Max. shutter speed
1/8000 sec
1/4000 sec
Built-in flash
External flash
Viewfinder
Optical (optional)
Optical
White balance presets
9
6
Screen size
3"
3"
Screen resolution
460,000 dots
1,040,000 dots
Video capture
Max. video resolution
1920x1080 (30p/25p/24p)
Storage types
SD/SDHC/SDXC
SDHC, SDXC, Secure Digital
USB
USB 2.0 (480 Mbit/sec)
USB 2.0 (480 Mbit/sec)
HDMI
Wireless
GPS
Battery
Lithium-Ion D-LI68 rechargeable battery
Li-Ion
Weight
200 g
530 g
Dimensions
102 x 58 x 34 mm
128.8 x 97.5 x 75.3 mm
Year
2012
2010
Choose cameras to compare
Popular comparisons:
- Pentax Q10 vs. Fujifilm X10
- Pentax Q10 vs. Canon PowerShot G15
- Pentax Q10 vs. Pentax Q
- Pentax Q10 vs. Nikon 1 J1
- Pentax Q10 vs. Olympus PEN E-PL5
- Pentax Q10 vs. Ricoh GR Digital 4
- Pentax Q10 vs. Panasonic Lumix DMC-FZ200
- Pentax Q10 vs. Pentax K-01
- Pentax Q10 vs. Pentax Q7
- Pentax Q10 vs. Fujifilm X20
- Pentax Q10 vs. Fujifilm FinePix HS50 EXR
Diagonal
Diagonal is calculated by the use of Pythagorean theorem:
where w = sensor width and h = sensor height
| Diagonal = √ | w² + h² |
Pentax Q10 diagonal
The diagonal of Q10 sensor is not 1/2.3 or 0.43" (11 mm) as you might expect, but approximately two thirds of
that value - 7.7 mm. If you want to know why, see
sensor sizes.
w = 6.16 mm
h = 4.62 mm
w = 6.16 mm
h = 4.62 mm
| Diagonal = √ | 6.16² + 4.62² | = 7.70 mm |
Canon Rebel T2i 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.
Q10 sensor area
Width = 6.16 mm
Height = 4.62 mm
Surface area = 6.16 × 4.62 = 28.46 mm²
Height = 4.62 mm
Surface area = 6.16 × 4.62 = 28.46 mm²
Rebel T2i 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 |
Q10 pixel pitch
Sensor width = 6.16 mm
Sensor resolution width = 4060 pixels
Sensor resolution width = 4060 pixels
| Pixel pitch = | 6.16 | × 1000 | = 1.52 µm |
| 4060 |
Rebel T2i 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 |
Q10 pixel area
Pixel pitch = 1.52 µm
Pixel area = 1.52² = 2.31 µm²
Pixel area = 1.52² = 2.31 µm²
Rebel T2i 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 |
Q10 pixel density
Sensor resolution width = 4060 pixels
Sensor width = 0.616 cm
Pixel density = (4060 / 0.616)² / 1000000 = 43.44 MP/cm²
Sensor width = 0.616 cm
Pixel density = (4060 / 0.616)² / 1000000 = 43.44 MP/cm²
Rebel T2i 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
Q10 sensor resolution
Sensor width = 6.16 mm
Sensor height = 4.62 mm
Effective megapixels = 12.40
Resolution horizontal: X × r = 3053 × 1.33 = 4060
Resolution vertical: X = 3053
Sensor resolution = 4060 x 3053
Sensor height = 4.62 mm
Effective megapixels = 12.40
| r = 6.16/4.62 = 1.33 |
|
Resolution vertical: X = 3053
Sensor resolution = 4060 x 3053
Rebel T2i 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 |
Q10 crop factor
Sensor diagonal in mm = 7.70 mm
| Crop factor = | 43.27 | = 5.62 |
| 7.70 |
Rebel T2i 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).
Q10 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
Pentax Q10, take the aperture of the lens
you're using and multiply it with crop factor.
Crop factor for Pentax Q10 is 5.62
Crop factor for Pentax Q10 is 5.62
Rebel T2i 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 Rebel T2i, take the aperture of the lens
you're using and multiply it with crop factor.
Crop factor for Canon Rebel T2i is 1.61
Crop factor for Canon Rebel T2i is 1.61
Enter your screen size (diagonal)
My screen size is
inches
Actual size is currently adjusted to screen.
If your screen (phone, tablet, or monitor) is not in diagonal, then the actual size of a sensor won't be shown correctly.
If your screen (phone, tablet, or monitor) is not in diagonal, then the actual size of a sensor won't be shown correctly.