GE E1235 vs. GE E1240
Comparison
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| GE E1235 | GE E1240 | ||||
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Megapixels
12.40
12.50
Max. image resolution
4032 x 3024
4032 x 3024
Sensor
Sensor type
CCD
CCD
Sensor size
1/1.72" (~ 7.44 x 5.58 mm)
1/1.7" (~ 7.53 x 5.64 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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| GE E1235 | GE E1240 | |
Surface area:
| 41.52 mm² | vs | 42.47 mm² |
Difference: 0.95 mm² (2%)
E1240 sensor is slightly bigger than E1235 sensor (only 2% difference).
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: 0.04 µm² (1%)
A pixel on GE E1240 sensor is approx. 1% bigger than a pixel on GE E1235.
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
GE E1235
GE E1240
Total megapixels
Effective megapixels
Optical zoom
Yes
Yes
Digital zoom
Yes
Yes
ISO sensitivity
Auto, 80, 100, 200, 400, 800, 1600, 3200
Auto, 64, 100, 200, 400, 800, 1600, 3200
RAW
Manual focus
Normal focus range
60 cm
Macro focus range
10 cm
Focal length (35mm equiv.)
22 - 102 mm
40 - 160 mm
Aperture priority
No
No
Max. aperture
f2.8 - f4.9
f2.9 - f6.3
Metering
Centre weighted, Spot
Center-weighted average, Spot, TTL-AE
Exposure compensation
±2 EV (in 1/3 EV steps)
±2 EV (in 1/3 EV steps)
Shutter priority
No
No
Min. shutter speed
30 sec
4 sec
Max. shutter speed
1/2000 sec
1/2000 sec
Built-in flash
External flash
Viewfinder
None
None
White balance presets
6
7
Screen size
2.7"
3"
Screen resolution
230,400 dots
230,400 dots
Video capture
Max. video resolution
Storage types
SDHC, Secure Digital
SDHC, Secure Digital
USB
USB 2.0 (480 Mbit/sec)
USB 2.0 (480 Mbit/sec)
HDMI
Wireless
GPS
Battery
Li-Ion
Li-Ion
Weight
145 g
150 g
Dimensions
103 x 56 x 24 mm
98.5 x 58.5 x 24 mm
Year
2008
2007
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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 |
GE E1235 diagonal
The diagonal of E1235 sensor is not 1/1.72 or 0.58" (14.8 mm) as you might expect, but approximately two thirds of
that value - 9.3 mm. If you want to know why, see
sensor sizes.
w = 7.44 mm
h = 5.58 mm
w = 7.44 mm
h = 5.58 mm
| Diagonal = √ | 7.44² + 5.58² | = 9.30 mm |
GE E1240 diagonal
The diagonal of E1240 sensor is not 1/1.7 or 0.59" (14.9 mm) as you might expect, but approximately two thirds of
that value - 9.41 mm. If you want to know why, see
sensor sizes.
w = 7.53 mm
h = 5.64 mm
w = 7.53 mm
h = 5.64 mm
| Diagonal = √ | 7.53² + 5.64² | = 9.41 mm |
Surface area
Surface area is calculated by multiplying the width and the height of a sensor.
E1235 sensor area
Width = 7.44 mm
Height = 5.58 mm
Surface area = 7.44 × 5.58 = 41.52 mm²
Height = 5.58 mm
Surface area = 7.44 × 5.58 = 41.52 mm²
E1240 sensor area
Width = 7.53 mm
Height = 5.64 mm
Surface area = 7.53 × 5.64 = 42.47 mm²
Height = 5.64 mm
Surface area = 7.53 × 5.64 = 42.47 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 |
E1235 pixel pitch
Sensor width = 7.44 mm
Sensor resolution width = 4060 pixels
Sensor resolution width = 4060 pixels
| Pixel pitch = | 7.44 | × 1000 | = 1.83 µm |
| 4060 |
E1240 pixel pitch
Sensor width = 7.53 mm
Sensor resolution width = 4092 pixels
Sensor resolution width = 4092 pixels
| Pixel pitch = | 7.53 | × 1000 | = 1.84 µm |
| 4092 |
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 |
E1235 pixel area
Pixel pitch = 1.83 µm
Pixel area = 1.83² = 3.35 µm²
Pixel area = 1.83² = 3.35 µm²
E1240 pixel area
Pixel pitch = 1.84 µm
Pixel area = 1.84² = 3.39 µm²
Pixel area = 1.84² = 3.39 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 |
E1235 pixel density
Sensor resolution width = 4060 pixels
Sensor width = 0.744 cm
Pixel density = (4060 / 0.744)² / 1000000 = 29.78 MP/cm²
Sensor width = 0.744 cm
Pixel density = (4060 / 0.744)² / 1000000 = 29.78 MP/cm²
E1240 pixel density
Sensor resolution width = 4092 pixels
Sensor width = 0.753 cm
Pixel density = (4092 / 0.753)² / 1000000 = 29.53 MP/cm²
Sensor width = 0.753 cm
Pixel density = (4092 / 0.753)² / 1000000 = 29.53 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
E1235 sensor resolution
Sensor width = 7.44 mm
Sensor height = 5.58 mm
Effective megapixels = 12.40
Resolution horizontal: X × r = 3053 × 1.33 = 4060
Resolution vertical: X = 3053
Sensor resolution = 4060 x 3053
Sensor height = 5.58 mm
Effective megapixels = 12.40
| r = 7.44/5.58 = 1.33 |
|
Resolution vertical: X = 3053
Sensor resolution = 4060 x 3053
E1240 sensor resolution
Sensor width = 7.53 mm
Sensor height = 5.64 mm
Effective megapixels = 12.50
Resolution horizontal: X × r = 3054 × 1.34 = 4092
Resolution vertical: X = 3054
Sensor resolution = 4092 x 3054
Sensor height = 5.64 mm
Effective megapixels = 12.50
| r = 7.53/5.64 = 1.34 |
|
Resolution vertical: X = 3054
Sensor resolution = 4092 x 3054
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 |
E1235 crop factor
Sensor diagonal in mm = 9.30 mm
| Crop factor = | 43.27 | = 4.65 |
| 9.30 |
E1240 crop factor
Sensor diagonal in mm = 9.41 mm
| Crop factor = | 43.27 | = 4.6 |
| 9.41 |
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).
E1235 equivalent aperture
Crop factor = 4.65
Aperture = f2.8 - f4.9
35-mm equivalent aperture = (f2.8 - f4.9) × 4.65 = f13 - f22.8
Aperture = f2.8 - f4.9
35-mm equivalent aperture = (f2.8 - f4.9) × 4.65 = f13 - f22.8
E1240 equivalent aperture
Crop factor = 4.6
Aperture = f2.9 - f6.3
35-mm equivalent aperture = (f2.9 - f6.3) × 4.6 = f13.3 - f29
Aperture = f2.9 - f6.3
35-mm equivalent aperture = (f2.9 - f6.3) × 4.6 = f13.3 - f29
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