Concord 642


Brand: Concord
Model: 642
Megapixels: 0.30
Sensor: 1/2" (~ 6.4 x 4.8 mm)
Price: check here »

Sensor info

Concord 642 comes with a 1/2" (~ 6.4 x 4.8 mm) CMOS sensor, which has a diagonal of 8.00 mm (0.31") and a surface area of 30.72 mm².
8.00 mm
Surface area
30.7 mm²
Pixel pitch
10.13 µm
Pixel area
102.62 µm²
Pixel density
0.98 MP/cm²
If you want to know about the accuracy of these numbers, click here.

Actual sensor size

Note: Actual size is set to screen → change »
This is the actual size of the 642 sensor: ~6.4 x 4.8 mm
The sensor has a surface area of 30.7 mm². There are approx. 300,000 photosites (pixels) on this area. Pixel pitch, which is a measure of the distance between pixels, is 10.13 µm. Pixel pitch tells you the distance from the center of one pixel (photosite) to the center of the next.

Pixel or photosite area is 102.62 µm². The larger the photosite, the more light it can capture and the more information can be recorded.

Pixel density tells you how many million pixels fit or would fit in one square cm of the sensor. Concord 642 has a pixel density of 0.98 MP/cm².

These numbers are important in terms of assessing the overall quality of a digital camera. Generally, the bigger (and newer) the sensor, pixel pitch and photosite area, and the smaller the pixel density, the better the camera. If you want to see how 642 compares to other cameras, click here.


Brand: Concord
Model: 642
Megapixels: 0.30
Sensor size: 1/2" (~ 6.4 x 4.8 mm)
Sensor type: CMOS
Sensor resolution: 632 x 475
Max. image resolution: 640 x 480
Crop factor: 5.41
Optical zoom: No
Digital zoom: Yes
ISO: Auto
RAW support:
Manual focus:
Normal focus range: 140 cm
Macro focus range:
Focal length (35mm equiv.): 46 mm
Aperture priority: No
Max aperture: f2.8
Max. aperture (35mm equiv.): f15.1
Depth of field: simulate →
Metering: Centre weighted
Exposure Compensation: ±2 EV (in 1/2 EV steps)
Shutter priority: No
Min. shutter speed: 15 sec
Max. shutter speed: 1/1500 sec
Built-in flash:
External flash:
Viewfinder: Optical
White balance presets:
Screen size: 1.5"
Screen resolution:
Video capture:
Storage types:
USB: USB 1.1
Battery: 2x AAA
Weight: 84 g
Dimensions: 103 x 50 x 31 mm
Year: 2004

Compare 642 with another camera



The diagonal of 642 sensor is not 1/2 or 0.5" (12.7 mm) as you might expect, but approximately two thirds of that value - 0.31" (8 mm). If you want to know why, see sensor sizes.

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

Concord 642 diagonal:

w = 6.40 mm
h = 4.80 mm
Diagonal =  6.40² + 4.80²   = 8.00 mm

Surface area

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

Width = 6.40 mm
Height = 4.80 mm

Surface area = 6.40 × 4.80 = 30.72 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

Concord 642 pixel pitch:

Sensor width = 6.40 mm
Sensor resolution width = 632 pixels
Pixel pitch =   6.40  × 1000  = 10.13 µm

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

Concord 642 pixel area:

Pixel pitch = 10.13 µm

Pixel area = 10.13² = 102.62 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

You could also use this formula:
Pixel density =   effective megapixels × 1000000  / 10000
sensor surface area in mm²

Concord 642 pixel density:

Sensor resolution width = 632 pixels
Sensor width = 0.64 cm

Pixel density = (632 / 0.64)² / 1000000 = 0.98 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
3. To get sensor resolution we then multiply X with the corresponding ratio:

Resolution horizontal: X × r
Resolution vertical: X

Concord 642 sensor resolution:

Sensor width = 6.40 mm
Sensor height = 4.80 mm
Effective megapixels = 0.30
r = 6.40/4.80 = 1.33
X =  0.30 × 1000000  = 475
Resolution horizontal: X × r = 475 × 1.33 = 632
Resolution vertical: X = 475

Sensor resolution = 632 x 475

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

Concord 642 crop factor:

Sensor diagonal = 8.00 mm
Crop factor =   43.27  = 5.41

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).

Concord 642 equivalent aperture:

Crop factor = 5.41
Aperture = f2.8

35-mm equivalent aperture = (f2.8) × 5.41 = f15.1

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