Olympus C-820L vs. Olympus C-860L

Comparison

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C-820L image
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C-860L image
Olympus C-820L Olympus C-860L
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Megapixels
0.81
1.31
Max. image resolution
1024 x 768
1280 x 960

Sensor

Sensor type
CCD
CCD
Sensor size
1/3" (~ 4.8 x 3.6 mm)
1/2.7" (~ 5.33 x 4 mm)
Sensor resolution
1037 x 780
1319 x 992
Diagonal
6.00 mm
6.66 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

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vs
1 : 1.23
(ratio)
Olympus C-820L Olympus C-860L
Surface area:
17.28 mm² vs 21.32 mm²
Difference: 4.04 mm² (23%)
C-860L sensor is approx. 1.23x bigger than C-820L sensor.
Note: You are comparing cameras of different generations. There is a 3 year gap between Olympus C-820L (1997) and Olympus C-860L (2000). All things being equal, newer sensor generations generally outperform the older.
Pixel pitch
4.63 µm
4.04 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: 0.59 µm (15%)
Pixel pitch of C-820L is approx. 15% higher than pixel pitch of C-860L.
Pixel area
21.44 µm²
16.32 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: 5.12 µm² (31%)
A pixel on Olympus C-820L sensor is approx. 31% bigger than a pixel on Olympus C-860L.
Pixel density
4.67 MP/cm²
6.12 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: 1.45 µm (31%)
Olympus C-860L has approx. 31% higher pixel density than Olympus C-820L.
To learn about the accuracy of these numbers, click here.



Specs

Olympus C-820L
Olympus C-860L
Crop factor
7.21
6.5
Total megapixels
Effective megapixels
Optical zoom
No
No
Digital zoom
Yes
Yes
ISO sensitivity
100
120, 150, 200
RAW
Manual focus
Normal focus range
70 cm
50 cm
Macro focus range
20 cm
10 cm
Focal length (35mm equiv.)
36 mm
36 mm
Aperture priority
No
No
Max. aperture
f2.8
f2.8
Max. aperture (35mm equiv.)
f20.2
f18.2
Metering
Centre weighted
Centre weighted
Exposure compensation
±1.5 EV (in 1/2 EV steps)
±2 EV (in 1/2 EV steps)
Shutter priority
No
No
Min. shutter speed
1/4 sec
1/2 sec
Max. shutter speed
1/500 sec
1/500 sec
Built-in flash
External flash
Viewfinder
Optical
Optical
White balance presets
5
5
Screen size
1.8"
1.8"
Screen resolution
61,000 dots
Video capture
Max. video resolution
Storage types
SmartMedia
SmartMedia
USB
HDMI
Wireless
GPS
Battery
4x AA
4x AA
Weight
340 g
330 g
Dimensions
128 x 65 x 45 mm
128 x 65 x 47 mm
Year
1997
2000




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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-820L diagonal

The diagonal of C-820L 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

Olympus C-860L diagonal

The diagonal of C-860L 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


Surface area

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

C-820L sensor area

Width = 4.80 mm
Height = 3.60 mm

Surface area = 4.80 × 3.60 = 17.28 mm²

C-860L sensor area

Width = 5.33 mm
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

C-820L pixel pitch

Sensor width = 4.80 mm
Sensor resolution width = 1037 pixels
Pixel pitch =   4.80  × 1000  = 4.63 µm
1037

C-860L pixel pitch

Sensor width = 5.33 mm
Sensor resolution width = 1319 pixels
Pixel pitch =   5.33  × 1000  = 4.04 µm
1319


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-820L pixel area

Pixel pitch = 4.63 µm

Pixel area = 4.63² = 21.44 µm²

C-860L pixel area

Pixel pitch = 4.04 µm

Pixel area = 4.04² = 16.32 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-820L pixel density

Sensor resolution width = 1037 pixels
Sensor width = 0.48 cm

Pixel density = (1037 / 0.48)² / 1000000 = 4.67 MP/cm²

C-860L pixel density

Sensor resolution width = 1319 pixels
Sensor width = 0.533 cm

Pixel density = (1319 / 0.533)² / 1000000 = 6.12 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-820L sensor resolution

Sensor width = 4.80 mm
Sensor height = 3.60 mm
Effective megapixels = 0.81
r = 4.80/3.60 = 1.33
X =  0.81 × 1000000  = 780
1.33
Resolution horizontal: X × r = 780 × 1.33 = 1037
Resolution vertical: X = 780

Sensor resolution = 1037 x 780

C-860L sensor resolution

Sensor width = 5.33 mm
Sensor height = 4.00 mm
Effective megapixels = 1.31
r = 5.33/4.00 = 1.33
X =  1.31 × 1000000  = 992
1.33
Resolution horizontal: X × r = 992 × 1.33 = 1319
Resolution vertical: X = 992

Sensor resolution = 1319 x 992


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-820L crop factor

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

C-860L 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).

C-820L equivalent aperture

Crop factor = 7.21
Aperture = f2.8

35-mm equivalent aperture = (f2.8) × 7.21 = f20.2

C-860L equivalent aperture

Crop factor = 6.5
Aperture = f2.8

35-mm equivalent aperture = (f2.8) × 6.5 = f18.2

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