Concord 3046 vs. Canon PowerShot A540

Comparison

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Concord 3046

Canon PowerShot A540

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Megapixels

3.14

6.00

Max. image resolution

2848 x 2136

2816 x 2112

Sensor

Sensor type

CMOS

CCD

Sensor size

1/2" (~ 6.4 x 4.8 mm)

1/2.5" (~ 5.75 x 4.32 mm)

Sensor resolution

2044 x 1537

2825 x 2124

Diagonal

8.00 mm

7.19 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
1.24	:	1
(ratio)

Concord 3046		Canon PowerShot A540

Surface area:

30.72 mm²

24.84 mm²

Difference: 5.88 mm² (24%)

3046 sensor is approx. 1.24x bigger than A540 sensor.

Pixel pitch

3.13 µm

2.04 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: 1.09 µm (53%)

Pixel pitch of 3046 is approx. 53% higher than pixel pitch of A540.

Pixel area

9.8 µm²

4.16 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:

Pixel area difference: 5.64 µm² (136%)

A pixel on Concord 3046 sensor is approx. 136% bigger than a pixel on Canon A540.

Pixel density

10.2 MP/cm²

24.14 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: 13.94 µm (137%)

Canon A540 has approx. 137% higher pixel density than Concord 3046.

To learn about the accuracy of these numbers, click here.

Specs

Concord 3046

Canon A540

Crop factor

5.41

6.02

Total megapixels

6.20

Effective megapixels

6.00

Optical zoom

Digital zoom

Yes

ISO sensitivity

Auto

Auto, 80, 100, 200, 400, 800

RAW

Manual focus

Normal focus range

160 cm

45 cm

Macro focus range

40 cm

5 cm

Focal length (35mm equiv.)

48 mm

35 - 140 mm

Aperture priority

Yes

Max. aperture

f2.6 - f5.5

Max. aperture (35mm equiv.)

f16.2

f15.7 - f33.1

Metering

Centre weighted

Centre weighted, Matrix, Spot

Exposure compensation

±1.5 EV (in 1/3 EV steps)

±2 EV (in 1/3 EV steps)

Shutter priority

Yes

Min. shutter speed

1/7 sec

15 sec

Max. shutter speed

1/2000 sec

Built-in flash

External flash

Viewfinder

None

Optical (tunnel)

White balance presets

Screen size

1.5"

2.5"

Screen resolution

85,000 dots

Video capture

Max. video resolution

Storage types

Secure Digital

MultiMedia, Secure Digital

USB

USB 1.1

USB 2.0 (480 Mbit/sec)

HDMI

Wireless

GPS

Battery

2x AAA

AA (2) batteries (NiMH recommended)

Weight

82 g

222 g

Dimensions

89.5 x 56 x 24 mm

90 x 64 x 43 mm

Year

2005

2006

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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

Concord 3046 diagonal

The diagonal of 3046 sensor is not 1/2 or 0.5" (12.7 mm) as you might expect, but approximately two thirds of that value - 8 mm. If you want to know why, see sensor sizes.

w = 6.40 mm
h = 4.80 mm

Diagonal = √

6.40² + 4.80²

= 8.00 mm

Canon A540 diagonal

The diagonal of A540 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

Diagonal = √

5.75² + 4.32²

= 7.19 mm

Surface area

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

3046 sensor area

Width = 6.40 mm
Height = 4.80 mm

Surface area = 6.40 × 4.80 = 30.72 mm²

A540 sensor area

Width = 5.75 mm
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

3046 pixel pitch

Sensor width = 6.40 mm
Sensor resolution width = 2044 pixels

Pixel pitch =	6.40	× 1000	= 3.13 µm
	2044

A540 pixel pitch

Sensor width = 5.75 mm
Sensor resolution width = 2825 pixels

Pixel pitch =	5.75	× 1000	= 2.04 µm
	2825

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

3046 pixel area

Pixel pitch = 3.13 µm

Pixel area = 3.13² = 9.8 µm²

A540 pixel area

Pixel pitch = 2.04 µm

Pixel area = 2.04² = 4.16 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

3046 pixel density

Sensor resolution width = 2044 pixels
Sensor width = 0.64 cm

Pixel density = (2044 / 0.64)² / 1000000 = 10.2 MP/cm²

A540 pixel density

Sensor resolution width = 2825 pixels
Sensor width = 0.575 cm

Pixel density = (2825 / 0.575)² / 1000000 = 24.14 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

3046 sensor resolution

Sensor width = 6.40 mm
Sensor height = 4.80 mm
Effective megapixels = 3.14

r = 6.40/4.80 = 1.33

X = √	3.14 × 1000000	= 1537
	1.33

Resolution horizontal: X × r = 1537 × 1.33 = 2044
Resolution vertical: X = 1537

Sensor resolution = 2044 x 1537

A540 sensor resolution

Sensor width = 5.75 mm
Sensor height = 4.32 mm
Effective megapixels = 6.00

r = 5.75/4.32 = 1.33

X = √	6.00 × 1000000	= 2124
	1.33

Resolution horizontal: X × r = 2124 × 1.33 = 2825
Resolution vertical: X = 2124

Sensor resolution = 2825 x 2124

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

3046 crop factor

Sensor diagonal in mm = 8.00 mm

Crop factor =	43.27	= 5.41
	8.00

A540 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).

3046 equivalent aperture

Crop factor = 5.41
Aperture = f3

35-mm equivalent aperture = (f3) × 5.41 = f16.2

A540 equivalent aperture

Crop factor = 6.02
Aperture = f2.6 - f5.5

35-mm equivalent aperture = (f2.6 - f5.5) × 6.02 = f15.7 - f33.1

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