HP Photosmart C500 vs. HP Photosmart C618
Comparison
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| HP Photosmart C500 | HP Photosmart C618 | ||||
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Megapixels
2.00
2.11
Max. image resolution
1600 x 1200
1600 x 1200
Sensor
Sensor type
CCD
CCD
Sensor size
2/3" (~ 8.8 x 6.6 mm)
1/2.7" (~ 5.33 x 4 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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| 2.72 | : | 1 |
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| HP Photosmart C500 | HP Photosmart C618 | |
Surface area:
| 58.08 mm² | vs | 21.32 mm² |
Difference: 36.76 mm² (172%)
C500 sensor is approx. 2.72x bigger than C618 sensor.
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: 19.05 µm² (188%)
A pixel on HP C500 sensor is approx. 188% bigger than a pixel on HP C618.
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 C500
HP C618
Total megapixels
Effective megapixels
Optical zoom
3x
3.2x
Digital zoom
Yes
Yes
ISO sensitivity
80
100, 400
RAW
Manual focus
Normal focus range
60 cm
50 cm
Macro focus range
20 cm
10 cm
Focal length (35mm equiv.)
38 - 115 mm
34 - 108 mm
Aperture priority
No
Yes
Max. aperture
f2.8 - f4.6
f2.4
Metering
Matrix, Spot
Centre weighted, Spot
Exposure compensation
±1.5 EV (in 1/3 EV steps)
±2 EV (in 1/2 EV steps)
Shutter priority
No
Yes
Min. shutter speed
2 sec
4 sec
Max. shutter speed
1/1000 sec
1/1000 sec
Built-in flash
External flash
Viewfinder
Optical (tunnel)
Optical (tunnel)
White balance presets
4
6
Screen size
2"
2"
Screen resolution
61,600 dots
127,000 dots
Video capture
Max. video resolution
Storage types
CompactFlash type I
CompactFlash type I, CompactFlash type II
USB
USB 1.0
USB 1.0
HDMI
Wireless
GPS
Battery
AA (3) batteries (NiMH recommended)
AA (4) batteries (NiMH recommended)
Weight
430 g
390 g
Dimensions
131 x 54 x 77 mm
128 x 72 x 57 mm
Year
1999
2000
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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 C500 diagonal
The diagonal of C500 sensor is not 2/3 or 0.67" (16.9 mm) as you might expect, but approximately two thirds of
that value - 11 mm. If you want to know why, see
sensor sizes.
w = 8.80 mm
h = 6.60 mm
w = 8.80 mm
h = 6.60 mm
| Diagonal = √ | 8.80² + 6.60² | = 11.00 mm |
HP C618 diagonal
The diagonal of C618 sensor is not 1/2.7 or 0.37" (9.4 mm) as you might expect, but approximately two thirds of
that value - 6.66 mm. If you want to know why, see
sensor sizes.
w = 5.33 mm
h = 4.00 mm
w = 5.33 mm
h = 4.00 mm
| Diagonal = √ | 5.33² + 4.00² | = 6.66 mm |
Surface area
Surface area is calculated by multiplying the width and the height of a sensor.
C500 sensor area
Width = 8.80 mm
Height = 6.60 mm
Surface area = 8.80 × 6.60 = 58.08 mm²
Height = 6.60 mm
Surface area = 8.80 × 6.60 = 58.08 mm²
C618 sensor area
Width = 5.33 mm
Height = 4.00 mm
Surface area = 5.33 × 4.00 = 21.32 mm²
Height = 4.00 mm
Surface area = 5.33 × 4.00 = 21.32 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 |
C500 pixel pitch
Sensor width = 8.80 mm
Sensor resolution width = 1631 pixels
Sensor resolution width = 1631 pixels
| Pixel pitch = | 8.80 | × 1000 | = 5.4 µm |
| 1631 |
C618 pixel pitch
Sensor width = 5.33 mm
Sensor resolution width = 1676 pixels
Sensor resolution width = 1676 pixels
| Pixel pitch = | 5.33 | × 1000 | = 3.18 µm |
| 1676 |
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 |
C500 pixel area
Pixel pitch = 5.4 µm
Pixel area = 5.4² = 29.16 µm²
Pixel area = 5.4² = 29.16 µm²
C618 pixel area
Pixel pitch = 3.18 µm
Pixel area = 3.18² = 10.11 µm²
Pixel area = 3.18² = 10.11 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 |
C500 pixel density
Sensor resolution width = 1631 pixels
Sensor width = 0.88 cm
Pixel density = (1631 / 0.88)² / 1000000 = 3.44 MP/cm²
Sensor width = 0.88 cm
Pixel density = (1631 / 0.88)² / 1000000 = 3.44 MP/cm²
C618 pixel density
Sensor resolution width = 1676 pixels
Sensor width = 0.533 cm
Pixel density = (1676 / 0.533)² / 1000000 = 9.89 MP/cm²
Sensor width = 0.533 cm
Pixel density = (1676 / 0.533)² / 1000000 = 9.89 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 → |
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Resolution horizontal: X × r
Resolution vertical: X
C500 sensor resolution
Sensor width = 8.80 mm
Sensor height = 6.60 mm
Effective megapixels = 2.00
Resolution horizontal: X × r = 1226 × 1.33 = 1631
Resolution vertical: X = 1226
Sensor resolution = 1631 x 1226
Sensor height = 6.60 mm
Effective megapixels = 2.00
| r = 8.80/6.60 = 1.33 |
|
Resolution vertical: X = 1226
Sensor resolution = 1631 x 1226
C618 sensor resolution
Sensor width = 5.33 mm
Sensor height = 4.00 mm
Effective megapixels = 2.11
Resolution horizontal: X × r = 1260 × 1.33 = 1676
Resolution vertical: X = 1260
Sensor resolution = 1676 x 1260
Sensor height = 4.00 mm
Effective megapixels = 2.11
| r = 5.33/4.00 = 1.33 |
|
Resolution vertical: X = 1260
Sensor resolution = 1676 x 1260
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 |
C500 crop factor
Sensor diagonal in mm = 11.00 mm
| Crop factor = | 43.27 | = 3.93 |
| 11.00 |
C618 crop factor
Sensor diagonal in mm = 6.66 mm
| Crop factor = | 43.27 | = 6.5 |
| 6.66 |
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).
C500 equivalent aperture
Crop factor = 3.93
Aperture = f2.8 - f4.6
35-mm equivalent aperture = (f2.8 - f4.6) × 3.93 = f11 - f18.1
Aperture = f2.8 - f4.6
35-mm equivalent aperture = (f2.8 - f4.6) × 3.93 = f11 - f18.1
C618 equivalent aperture
Crop factor = 6.5
Aperture = f2.4
35-mm equivalent aperture = (f2.4) × 6.5 = f15.6
Aperture = f2.4
35-mm equivalent aperture = (f2.4) × 6.5 = f15.6
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.