HP Photosmart R837 vs. Kodak EasyShare Z700
Comparison
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| HP Photosmart R837 | Kodak EasyShare Z700 | ||||
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Megapixels
7.40
4.00
Max. image resolution
3112 x 2328
2304 x 1728
Sensor
Sensor type
CCD
CCD
Sensor size
1/2.5" (~ 5.75 x 4.32 mm)
1/2.5" (~ 5.75 x 4.32 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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| HP Photosmart R837 | Kodak EasyShare Z700 | |
Surface area:
| 24.84 mm² | vs | 24.84 mm² |
Difference: 0 mm² (0%)
R837 and Z700 sensors are the same size.
Note: You are comparing cameras of different generations.
There is a 2 year gap between HP R837 (2007) and Kodak Z700 (2005).
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: 2.85 µm² (85%)
A pixel on Kodak Z700 sensor is approx. 85% bigger than a pixel on HP R837.
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
HP R837
Kodak Z700
Total megapixels
4.20
Effective megapixels
4.00
Optical zoom
3x
5x
Digital zoom
Yes
Yes
ISO sensitivity
Auto, 100, 200, 400
Auto, 60, 160, 200, 400
RAW
Manual focus
Normal focus range
50 cm
60 cm
Macro focus range
10 cm
10 cm
Focal length (35mm equiv.)
39 - 118 mm
35 - 175 mm
Aperture priority
No
No
Max. aperture
f3.5 - f4.2
f2.9 - f4.9
Metering
Evaluative, Spot, TTL-AE
Centre weighted, Multi-pattern, Spot
Exposure compensation
±2 EV (in 1/2 EV steps)
±2 EV (in 1/2 EV steps)
Shutter priority
No
No
Min. shutter speed
10 sec
8 sec
Max. shutter speed
1/2000 sec
1/1600 sec
Built-in flash
External flash
Viewfinder
None
Optical (tunnel)
White balance presets
5
4
Screen size
3"
1.6"
Screen resolution
61,600 dots
72,000 dots
Video capture
Max. video resolution
Storage types
Secure Digital
MultiMedia, Secure Digital
USB
USB 1.0
USB 1.0
HDMI
Wireless
GPS
Battery
HP Lithium-Ion rechargeable supplied
AA (2) batteries (NiMH recommended)
Weight
155 g
219 g
Dimensions
100 x 27 x 6 mm
96.8 x 72.4 x 55.6 mm
Year
2007
2005
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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 |
HP R837 diagonal
The diagonal of R837 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 |
Kodak Z700 diagonal
The diagonal of Z700 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 |
Surface area
Surface area is calculated by multiplying the width and the height of a sensor.
R837 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
Z700 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
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 |
R837 pixel pitch
Sensor width = 5.75 mm
Sensor resolution width = 3137 pixels
Sensor resolution width = 3137 pixels
| Pixel pitch = | 5.75 | × 1000 | = 1.83 µm |
| 3137 |
Z700 pixel pitch
Sensor width = 5.75 mm
Sensor resolution width = 2306 pixels
Sensor resolution width = 2306 pixels
| Pixel pitch = | 5.75 | × 1000 | = 2.49 µm |
| 2306 |
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 |
R837 pixel area
Pixel pitch = 1.83 µm
Pixel area = 1.83² = 3.35 µm²
Pixel area = 1.83² = 3.35 µm²
Z700 pixel area
Pixel pitch = 2.49 µm
Pixel area = 2.49² = 6.2 µm²
Pixel area = 2.49² = 6.2 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 |
R837 pixel density
Sensor resolution width = 3137 pixels
Sensor width = 0.575 cm
Pixel density = (3137 / 0.575)² / 1000000 = 29.76 MP/cm²
Sensor width = 0.575 cm
Pixel density = (3137 / 0.575)² / 1000000 = 29.76 MP/cm²
Z700 pixel density
Sensor resolution width = 2306 pixels
Sensor width = 0.575 cm
Pixel density = (2306 / 0.575)² / 1000000 = 16.08 MP/cm²
Sensor width = 0.575 cm
Pixel density = (2306 / 0.575)² / 1000000 = 16.08 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
R837 sensor resolution
Sensor width = 5.75 mm
Sensor height = 4.32 mm
Effective megapixels = 7.40
Resolution horizontal: X × r = 2359 × 1.33 = 3137
Resolution vertical: X = 2359
Sensor resolution = 3137 x 2359
Sensor height = 4.32 mm
Effective megapixels = 7.40
| r = 5.75/4.32 = 1.33 |
|
Resolution vertical: X = 2359
Sensor resolution = 3137 x 2359
Z700 sensor resolution
Sensor width = 5.75 mm
Sensor height = 4.32 mm
Effective megapixels = 4.00
Resolution horizontal: X × r = 1734 × 1.33 = 2306
Resolution vertical: X = 1734
Sensor resolution = 2306 x 1734
Sensor height = 4.32 mm
Effective megapixels = 4.00
| r = 5.75/4.32 = 1.33 |
|
Resolution vertical: X = 1734
Sensor resolution = 2306 x 1734
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 |
R837 crop factor
Sensor diagonal in mm = 7.19 mm
| Crop factor = | 43.27 | = 6.02 |
| 7.19 |
Z700 crop factor
Sensor diagonal in mm = 7.19 mm
| Crop factor = | 43.27 | = 6.02 |
| 7.19 |
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).
R837 equivalent aperture
Crop factor = 6.02
Aperture = f3.5 - f4.2
35-mm equivalent aperture = (f3.5 - f4.2) × 6.02 = f21.1 - f25.3
Aperture = f3.5 - f4.2
35-mm equivalent aperture = (f3.5 - f4.2) × 6.02 = f21.1 - f25.3
Z700 equivalent aperture
Crop factor = 6.02
Aperture = f2.9 - f4.9
35-mm equivalent aperture = (f2.9 - f4.9) × 6.02 = f17.5 - f29.5
Aperture = f2.9 - f4.9
35-mm equivalent aperture = (f2.9 - f4.9) × 6.02 = f17.5 - f29.5
Enter your screen size (diagonal)
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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.