Pentax Optio WG-2 GPS vs. Canon PowerShot G2
Comparison
| change cameras » | |||||
|
vs |
|
|||
| Pentax Optio WG-2 GPS | Canon PowerShot G2 | ||||
| check price » | check price » | ||||
Megapixels
16.00
3.90
Max. image resolution
4288 x 3216
2272 x 1704
Sensor
Sensor type
CMOS
CCD
Sensor size
1/2.3" (~ 6.16 x 4.62 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 »
|
|
vs |
|
| 1 | : | 1.33 |
| (ratio) | ||
| Pentax Optio WG-2 GPS | Canon PowerShot G2 | |
Surface area:
| 28.46 mm² | vs | 37.90 mm² |
Difference: 9.44 mm² (33%)
G2 sensor is approx. 1.33x bigger than WG-2 GPS sensor.
Note: You are comparing sensors of vastly different generations.
There is a gap of 11 years between Pentax WG-2 GPS (2012) and
Canon G2 (2001).
Eleven 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: 7.93 µm² (441%)
A pixel on Canon G2 sensor is approx. 441% bigger than a pixel on Pentax WG-2 GPS.
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 WG-2 GPS
Canon G2
Total megapixels
16.80
4.10
Effective megapixels
16.00
3.90
Optical zoom
5x
3x
Digital zoom
Yes
Yes
ISO sensitivity
Auto, 125-6400, 125, 200, 400,800, 1600, 3200, 6400
Auto, 50, 100, 200, 400
RAW
Manual focus
Normal focus range
50 cm
70 cm
Macro focus range
1 cm
6 cm
Focal length (35mm equiv.)
28 - 140 mm
34 - 102 mm
Aperture priority
No
Yes
Max. aperture
f3.5 - f5.5
f2.0 - f2.5
Metering
Multi, Center-weighted, Spot
Centre weighted, Spot, Spot-AF
Exposure compensation
±2 EV (in 1/3 EV steps)
±2 EV (in 1/3 EV steps)
Shutter priority
No
Yes
Min. shutter speed
4 sec
15 sec
Max. shutter speed
1/4000 sec
1/1000 sec
Built-in flash
External flash
Viewfinder
None
Optical (tunnel)
White balance presets
4
6
Screen size
3"
1.8"
Screen resolution
460,000 dots
113,578 dots
Video capture
Max. video resolution
Storage types
SD/SDHC/SDXC card, Internal
CompactFlash type I, CompactFlash type II, Microdrive
USB
USB 2.0 (480 Mbit/sec)
USB 1.0
HDMI
Wireless
GPS
Battery
Lithium-Ion D-LI92 rechargeable battery
Canon Lithium-Ion
Weight
198 g
510 g
Dimensions
122 x 61 x 30 mm
120.9 x 76.6 x 63.8 mm
Year
2012
2001
Choose cameras to compare
Popular comparisons:
- Pentax Optio WG-2 GPS vs. Fujifilm FinePix XP60
- Pentax Optio WG-2 GPS vs. Nikon Coolpix AW100
- Pentax Optio WG-2 GPS vs. Pentax Optio WG-3
- Pentax Optio WG-2 GPS vs. Nikon Coolpix AW110
- Pentax Optio WG-2 GPS vs. Canon PowerShot G2
- Pentax Optio WG-2 GPS vs. Fujifilm FinePix XP200
- Pentax Optio WG-2 GPS vs. Pentax Optio W90
- Pentax Optio WG-2 GPS vs. Canon PowerShot G1 X
- Pentax Optio WG-2 GPS vs. Nikon D7100
- Pentax Optio WG-2 GPS vs. Pentax Optio WG-2
- Pentax Optio WG-2 GPS vs. Olympus TG-830 iHS
Diagonal
Diagonal is calculated by the use of Pythagorean theorem:
where w = sensor width and h = sensor height
| Diagonal = √ | w² + h² |
Pentax WG-2 GPS diagonal
The diagonal of WG-2 GPS 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 G2 diagonal
The diagonal of G2 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.
WG-2 GPS 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
G2 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 |
WG-2 GPS pixel pitch
Sensor width = 6.16 mm
Sensor resolution width = 4612 pixels
Sensor resolution width = 4612 pixels
| Pixel pitch = | 6.16 | × 1000 | = 1.34 µm |
| 4612 |
G2 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 |
WG-2 GPS pixel area
Pixel pitch = 1.34 µm
Pixel area = 1.34² = 1.8 µm²
Pixel area = 1.34² = 1.8 µm²
G2 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 |
WG-2 GPS pixel density
Sensor resolution width = 4612 pixels
Sensor width = 0.616 cm
Pixel density = (4612 / 0.616)² / 1000000 = 56.06 MP/cm²
Sensor width = 0.616 cm
Pixel density = (4612 / 0.616)² / 1000000 = 56.06 MP/cm²
G2 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
WG-2 GPS sensor resolution
Sensor width = 6.16 mm
Sensor height = 4.62 mm
Effective megapixels = 16.00
Resolution horizontal: X × r = 3468 × 1.33 = 4612
Resolution vertical: X = 3468
Sensor resolution = 4612 x 3468
Sensor height = 4.62 mm
Effective megapixels = 16.00
| r = 6.16/4.62 = 1.33 |
|
Resolution vertical: X = 3468
Sensor resolution = 4612 x 3468
G2 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 |
WG-2 GPS crop factor
Sensor diagonal in mm = 7.70 mm
| Crop factor = | 43.27 | = 5.62 |
| 7.70 |
G2 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).
WG-2 GPS equivalent aperture
Crop factor = 5.62
Aperture = f3.5 - f5.5
35-mm equivalent aperture = (f3.5 - f5.5) × 5.62 = f19.7 - f30.9
Aperture = f3.5 - f5.5
35-mm equivalent aperture = (f3.5 - f5.5) × 5.62 = f19.7 - f30.9
G2 equivalent aperture
Crop factor = 4.87
Aperture = f2.0 - f2.5
35-mm equivalent aperture = (f2.0 - f2.5) × 4.87 = f9.7 - f12.2
Aperture = f2.0 - f2.5
35-mm equivalent aperture = (f2.0 - f2.5) × 4.87 = f9.7 - f12.2
More comparisons of Pentax WG-2 GPS:
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.