Fujifilm FinePix M603 vs. Fujifilm FinePix PR21

Comparison

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Fujifilm FinePix M603

Fujifilm FinePix PR21

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Megapixels

3.10

2.30

Max. image resolution

2832 x 2128

1800 x 1200

Sensor

Sensor type

CCD

Sensor size

1/1.7" (~ 7.53 x 5.64 mm)

1/2" (~ 6.4 x 4.8 mm)

Sensor resolution

2038 x 1521

1749 x 1315

Diagonal

9.41 mm

8.00 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
1.38	:	1
(ratio)

Fujifilm FinePix M603		Fujifilm FinePix PR21

Surface area:

42.47 mm²

30.72 mm²

Difference: 11.75 mm² (38%)

M603 sensor is approx. 1.38x bigger than PR21 sensor.

Pixel pitch

3.69 µm

3.66 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: 0.03 µm (0.8%)

Pixel pitch of M603 is approx. 0.8% higher than pixel pitch of PR21.

Pixel area

13.62 µm²

13.4 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: 0.22 µm² (2%)

A pixel on Fujifilm M603 sensor is approx. 2% bigger than a pixel on Fujifilm PR21.

Pixel density

7.33 MP/cm²

7.47 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: 0.14 µm (2%)

Fujifilm PR21 has approx. 2% higher pixel density than Fujifilm M603.

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

Specs

Fujifilm M603

Fujifilm PR21

Crop factor

4.6

5.41

Total megapixels

3.30

Effective megapixels

3.10

Optical zoom

Digital zoom

Yes

ISO sensitivity

160, 200, 400, 800, 1600

125

RAW

Manual focus

Normal focus range

60 cm

50 cm

Macro focus range

20 cm

9 cm

Focal length (35mm equiv.)

38 - 76 mm

35 mm

Aperture priority

Max. aperture

f3.2

Max. aperture (35mm equiv.)

f14.7

f17.3

Metering

64-segment, Multi Spot, Spot

Centre weighted

Exposure compensation

±2 EV (in 1/3 EV steps)

-0.9 - +1.5 EV (in 1/3 EV steps)

Shutter priority

Min. shutter speed

1/4 sec

Max. shutter speed

1/2000 sec

1/1000 sec

Built-in flash

External flash

Viewfinder

Optical (tunnel)

Optical

White balance presets

Screen size

2.5"

1.8"

Screen resolution

118,000 dots

Video capture

Max. video resolution

Storage types

CompactFlash type I, CompactFlash type II, Microdrive, xD Picture

SmartMedia

USB

USB 1.0

HDMI

Wireless

GPS

Battery

Lithium-Ion (NP-60)

3x AA

Weight

280 g

550 g

Dimensions

64.5 x 93.3 x 31.6 mm

113 x 127 x 60 mm

Year

2002

2001

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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

Fujifilm M603 diagonal

The diagonal of M603 sensor is not 1/1.7 or 0.59" (14.9 mm) as you might expect, but approximately two thirds of that value - 9.41 mm. If you want to know why, see sensor sizes.

w = 7.53 mm
h = 5.64 mm

Diagonal = √

7.53² + 5.64²

= 9.41 mm

Fujifilm PR21 diagonal

The diagonal of PR21 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

Surface area

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

M603 sensor area

Width = 7.53 mm
Height = 5.64 mm

Surface area = 7.53 × 5.64 = 42.47 mm²

PR21 sensor area

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

M603 pixel pitch

Sensor width = 7.53 mm
Sensor resolution width = 2038 pixels

Pixel pitch =	7.53	× 1000	= 3.69 µm
	2038

PR21 pixel pitch

Sensor width = 6.40 mm
Sensor resolution width = 1749 pixels

Pixel pitch =	6.40	× 1000	= 3.66 µm
	1749

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

M603 pixel area

Pixel pitch = 3.69 µm

Pixel area = 3.69² = 13.62 µm²

PR21 pixel area

Pixel pitch = 3.66 µm

Pixel area = 3.66² = 13.4 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

M603 pixel density

Sensor resolution width = 2038 pixels
Sensor width = 0.753 cm

Pixel density = (2038 / 0.753)² / 1000000 = 7.33 MP/cm²

PR21 pixel density

Sensor resolution width = 1749 pixels
Sensor width = 0.64 cm

Pixel density = (1749 / 0.64)² / 1000000 = 7.47 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

M603 sensor resolution

Sensor width = 7.53 mm
Sensor height = 5.64 mm
Effective megapixels = 3.10

r = 7.53/5.64 = 1.34

X = √	3.10 × 1000000	= 1521
	1.34

Resolution horizontal: X × r = 1521 × 1.34 = 2038
Resolution vertical: X = 1521

Sensor resolution = 2038 x 1521

PR21 sensor resolution

Sensor width = 6.40 mm
Sensor height = 4.80 mm
Effective megapixels = 2.30

r = 6.40/4.80 = 1.33

X = √	2.30 × 1000000	= 1315
	1.33

Resolution horizontal: X × r = 1315 × 1.33 = 1749
Resolution vertical: X = 1315

Sensor resolution = 1749 x 1315

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

M603 crop factor

Sensor diagonal in mm = 9.41 mm

Crop factor =	43.27	= 4.6
	9.41

PR21 crop factor

Sensor diagonal in mm = 8.00 mm

Crop factor =	43.27	= 5.41
	8.00

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).

M603 equivalent aperture

Crop factor = 4.6
Aperture = f3.2

35-mm equivalent aperture = (f3.2) × 4.6 = f14.7

PR21 equivalent aperture

Crop factor = 5.41
Aperture = f3.2

35-mm equivalent aperture = (f3.2) × 5.41 = f17.3

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