Samsung Digimax U-CA501 vs. Samsung Digimax 301

Comparison

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Samsung Digimax U-CA501

Samsung Digimax 301

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Megapixels

5.00

3.10

Max. image resolution

2560 x 1920

2048 x 1536

Sensor

Sensor type

CCD

Sensor size

1/2.5" (~ 5.75 x 4.32 mm)

1/2.7" (~ 5.33 x 4 mm)

Sensor resolution

2579 x 1939

2031 x 1527

Diagonal

7.19 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

Note: Actual size is set to screen → change »

	vs
1.17	:	1
(ratio)

Samsung Digimax U-CA501		Samsung Digimax 301

Surface area:

24.84 mm²

21.32 mm²

Difference: 3.52 mm² (17%)

U-CA501 sensor is approx. 1.17x bigger than 301 sensor.

Pixel pitch

2.23 µm

2.62 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: 0.39 µm (17%)

Pixel pitch of 301 is approx. 17% higher than pixel pitch of U-CA501.

Pixel area

4.97 µm²

6.86 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: 1.89 µm² (38%)

A pixel on Samsung 301 sensor is approx. 38% bigger than a pixel on Samsung U-CA501.

Pixel density

20.12 MP/cm²

14.52 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: 5.6 µm (39%)

Samsung U-CA501 has approx. 39% higher pixel density than Samsung 301.

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

Specs

Samsung U-CA501

Samsung 301

Crop factor

6.02

6.5

Total megapixels

3.30

Effective megapixels

3.10

Optical zoom

0.9x

Digital zoom

Yes

ISO sensitivity

Auto, 100, 200, 400

Auto, (100-400)

RAW

Manual focus

Normal focus range

60 cm

100 cm

Macro focus range

6 cm

19 cm

Focal length (35mm equiv.)

35 mm

35 - 33 mm

Aperture priority

Max. aperture

f3.2

f3.9

Max. aperture (35mm equiv.)

f19.3

f25.4

Metering

Multi Spot, Spot

Exposure compensation

±2 EV (in 1/2 EV steps)

Shutter priority

Min. shutter speed

8 sec

5 sec

Max. shutter speed

1/1000 sec

Built-in flash

External flash

Viewfinder

Optical

Optical (tunnel)

White balance presets

Screen size

1.6"

Screen resolution

117,600 dots

Video capture

Max. video resolution

Storage types

Secure Digital

MultiMedia, Secure Digital

USB

USB 1.1

USB 1.0

HDMI

Wireless

GPS

Battery

1x CR-V3, Li-Ion

AA (2) batteries (NiMH recommended)

Weight

110 g

140 g

Dimensions

97 x 52 x 23 mm

98 x 51 x 37.3 mm

Year

2004

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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

Samsung U-CA501 diagonal

The diagonal of U-CA501 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

Samsung 301 diagonal

The diagonal of 301 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.

U-CA501 sensor area

Width = 5.75 mm
Height = 4.32 mm

Surface area = 5.75 × 4.32 = 24.84 mm²

301 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

U-CA501 pixel pitch

Sensor width = 5.75 mm
Sensor resolution width = 2579 pixels

Pixel pitch =	5.75	× 1000	= 2.23 µm
	2579

301 pixel pitch

Sensor width = 5.33 mm
Sensor resolution width = 2031 pixels

Pixel pitch =	5.33	× 1000	= 2.62 µm
	2031

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

U-CA501 pixel area

Pixel pitch = 2.23 µm

Pixel area = 2.23² = 4.97 µm²

301 pixel area

Pixel pitch = 2.62 µm

Pixel area = 2.62² = 6.86 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

U-CA501 pixel density

Sensor resolution width = 2579 pixels
Sensor width = 0.575 cm

Pixel density = (2579 / 0.575)² / 1000000 = 20.12 MP/cm²

301 pixel density

Sensor resolution width = 2031 pixels
Sensor width = 0.533 cm

Pixel density = (2031 / 0.533)² / 1000000 = 14.52 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

U-CA501 sensor resolution

Sensor width = 5.75 mm
Sensor height = 4.32 mm
Effective megapixels = 5.00

r = 5.75/4.32 = 1.33

X = √	5.00 × 1000000	= 1939
	1.33

Resolution horizontal: X × r = 1939 × 1.33 = 2579
Resolution vertical: X = 1939

Sensor resolution = 2579 x 1939

301 sensor resolution

Sensor width = 5.33 mm
Sensor height = 4.00 mm
Effective megapixels = 3.10

r = 5.33/4.00 = 1.33

X = √	3.10 × 1000000	= 1527
	1.33

Resolution horizontal: X × r = 1527 × 1.33 = 2031
Resolution vertical: X = 1527

Sensor resolution = 2031 x 1527

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

U-CA501 crop factor

Sensor diagonal in mm = 7.19 mm

Crop factor =	43.27	= 6.02
	7.19

301 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).

U-CA501 equivalent aperture

Crop factor = 6.02
Aperture = f3.2

35-mm equivalent aperture = (f3.2) × 6.02 = f19.3

301 equivalent aperture

Crop factor = 6.5
Aperture = f3.9

35-mm equivalent aperture = (f3.9) × 6.5 = f25.4

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