Olympus C-200 Zoom vs. HP Photosmart 620

Comparison

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C-200 Zoom image
vs
Photosmart 620 image
Olympus C-200 Zoom HP Photosmart 620
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Megapixels
2.11
2.10
Max. image resolution
1600 x 1200
1632 x 1232

Sensor

Sensor type
CCD
CCD
Sensor size
1/2.7" (~ 5.33 x 4 mm)
1/3" (~ 4.8 x 3.6 mm)
Sensor resolution
1676 x 1260
1672 x 1257
Diagonal
6.66 mm
6.00 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 »

Actual sensor size

Note: Actual size is set to screen → change »
vs
1.23 : 1
(ratio)
Olympus C-200 Zoom HP Photosmart 620
Surface area:
21.32 mm² vs 17.28 mm²
Difference: 4.04 mm² (23%)
C-200 Zoom sensor is approx. 1.23x bigger than 620 sensor.
Pixel pitch
3.18 µm
2.87 µm
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.
Difference: 0.31 µm (11%)
Pixel pitch of C-200 Zoom is approx. 11% higher than pixel pitch of 620.
Pixel area
10.11 µm²
8.24 µm²
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.
Relative pixel sizes:
vs
Pixel area difference: 1.87 µm² (23%)
A pixel on Olympus C-200 Zoom sensor is approx. 23% bigger than a pixel on HP 620.
Pixel density
9.89 MP/cm²
12.13 MP/cm²
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.
Difference: 2.24 µm (23%)
HP 620 has approx. 23% higher pixel density than Olympus C-200 Zoom.
To learn about the accuracy of these numbers, click here.



Specs

Olympus C-200 Zoom
HP 620
Crop factor
6.5
7.21
Total megapixels
Effective megapixels
Optical zoom
Yes
2.8x
Digital zoom
Yes
Yes
ISO sensitivity
Auto, 100,200, 400
100
RAW
Manual focus
Normal focus range
80 cm
20 cm
Macro focus range
20 cm
20 cm
Focal length (35mm equiv.)
35 - 105 mm
36 - 102 mm
Aperture priority
No
No
Max. aperture
f2.8 - f4.4
f2.8 - f4.4
Max. aperture (35mm equiv.)
f18.2 - f28.6
f20.2 - f31.7
Metering
ESP Digital, Spot
Matrix
Exposure compensation
±2 EV (in 1/2 EV steps)
±3 EV (in 1/2 EV steps)
Shutter priority
No
No
Min. shutter speed
1/2 sec
1/3 sec
Max. shutter speed
1/1000 sec
1/1000 sec
Built-in flash
External flash
Viewfinder
Optical
Optical (tunnel)
White balance presets
6
5
Screen size
1.8"
1.5"
Screen resolution
61,000 dots
61,600 dots
Video capture
Max. video resolution
Storage types
SmartMedia
MultiMedia, Secure Digital
USB
USB 1.1
USB 1.0
HDMI
Wireless
GPS
Battery
2x CR-V3, 4x AA
AA (4) batteries (NiMH recommended)
Weight
285 g
207 g
Dimensions
117 x 66 x 50 mm
120 x 50 x 73 mm
Year
2001
2002




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Diagonal

Diagonal is calculated by the use of Pythagorean theorem:
Diagonal =  w² + h²
where w = sensor width and h = sensor height

Olympus C-200 Zoom diagonal

The diagonal of C-200 Zoom 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
Diagonal =  5.33² + 4.00²   = 6.66 mm

HP 620 diagonal

The diagonal of 620 sensor is not 1/3 or 0.33" (8.5 mm) as you might expect, but approximately two thirds of that value - 6 mm. If you want to know why, see sensor sizes.

w = 4.80 mm
h = 3.60 mm
Diagonal =  4.80² + 3.60²   = 6.00 mm


Surface area

Surface area is calculated by multiplying the width and the height of a sensor.

C-200 Zoom sensor area

Width = 5.33 mm
Height = 4.00 mm

Surface area = 5.33 × 4.00 = 21.32 mm²

620 sensor area

Width = 4.80 mm
Height = 3.60 mm

Surface area = 4.80 × 3.60 = 17.28 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

C-200 Zoom pixel pitch

Sensor width = 5.33 mm
Sensor resolution width = 1676 pixels
Pixel pitch =   5.33  × 1000  = 3.18 µm
1676

620 pixel pitch

Sensor width = 4.80 mm
Sensor resolution width = 1672 pixels
Pixel pitch =   4.80  × 1000  = 2.87 µm
1672


Pixel area

The area of one pixel can be calculated by simply squaring the pixel pitch:
Pixel area = pixel pitch²

You could also divide sensor surface area with effective megapixels:
Pixel area =   sensor surface area in mm²
effective megapixels

C-200 Zoom pixel area

Pixel pitch = 3.18 µm

Pixel area = 3.18² = 10.11 µm²

620 pixel area

Pixel pitch = 2.87 µm

Pixel area = 2.87² = 8.24 µm²


Pixel density

Pixel density can be calculated with the following 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

C-200 Zoom pixel density

Sensor resolution width = 1676 pixels
Sensor width = 0.533 cm

Pixel density = (1676 / 0.533)² / 1000000 = 9.89 MP/cm²

620 pixel density

Sensor resolution width = 1672 pixels
Sensor width = 0.48 cm

Pixel density = (1672 / 0.48)² / 1000000 = 12.13 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:
(X × r) × X = effective megapixels × 1000000    →   
X =  effective megapixels × 1000000
r
3. To get sensor resolution we then multiply X with the corresponding ratio:

Resolution horizontal: X × r
Resolution vertical: X

C-200 Zoom sensor resolution

Sensor width = 5.33 mm
Sensor height = 4.00 mm
Effective megapixels = 2.11
r = 5.33/4.00 = 1.33
X =  2.11 × 1000000  = 1260
1.33
Resolution horizontal: X × r = 1260 × 1.33 = 1676
Resolution vertical: X = 1260

Sensor resolution = 1676 x 1260

620 sensor resolution

Sensor width = 4.80 mm
Sensor height = 3.60 mm
Effective megapixels = 2.10
r = 4.80/3.60 = 1.33
X =  2.10 × 1000000  = 1257
1.33
Resolution horizontal: X × r = 1257 × 1.33 = 1672
Resolution vertical: X = 1257

Sensor resolution = 1672 x 1257


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


C-200 Zoom crop factor

Sensor diagonal in mm = 6.66 mm
Crop factor =   43.27  = 6.5
6.66

620 crop factor

Sensor diagonal in mm = 6.00 mm
Crop factor =   43.27  = 7.21
6.00

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).

C-200 Zoom equivalent aperture

Crop factor = 6.5
Aperture = f2.8 - f4.4

35-mm equivalent aperture = (f2.8 - f4.4) × 6.5 = f18.2 - f28.6

620 equivalent aperture

Crop factor = 7.21
Aperture = f2.8 - f4.4

35-mm equivalent aperture = (f2.8 - f4.4) × 7.21 = f20.2 - f31.7

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