Panasonic Lumix DMC-FS28 vs. Canon PowerShot G7

Comparison

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Panasonic Lumix DMC-FS28

Canon PowerShot G7

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Megapixels

14.10

10.00

Max. image resolution

4320 x 3240

3648 x 2736

Sensor

Sensor type

CCD

Sensor size

1/2.33" (~ 6.08 x 4.56 mm)

1/1.8" (~ 7.11 x 5.33 mm)

Sensor resolution

4330 x 3256

3647 x 2742

Diagonal

7.60 mm

8.89 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	:	1.37
(ratio)

Panasonic Lumix DMC-FS28		Canon PowerShot G7

Surface area:

27.72 mm²

37.90 mm²

Difference: 10.18 mm² (37%)

G7 sensor is approx. 1.37x bigger than FS28 sensor.

Note: You are comparing sensors of very different generations. There is a gap of 6 years between Panasonic FS28 (2012) and Canon G7 (2006). Six years is a lot of time in terms of technology, meaning newer sensors are overall much more efficient than the older ones.

Pixel pitch

1.4 µm

1.95 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: 0.55 µm (39%)

Pixel pitch of G7 is approx. 39% higher than pixel pitch of FS28.

Pixel area

1.96 µm²

3.8 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: 1.84 µm² (94%)

A pixel on Canon G7 sensor is approx. 94% bigger than a pixel on Panasonic FS28.

Pixel density

50.72 MP/cm²

26.31 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: 24.41 µm (93%)

Panasonic FS28 has approx. 93% higher pixel density than Canon G7.

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

Specs

Panasonic FS28

Canon G7

Crop factor

5.69

4.87

Total megapixels

10.30

Effective megapixels

10.00

Optical zoom

Yes

Digital zoom

Yes

ISO sensitivity

Auto, 100 - 1600

Auto, 80 , 100, 200, 400, 800, 1600

RAW

Manual focus

Normal focus range

5 cm

50 cm

Macro focus range

5 cm

1 cm

Focal length (35mm equiv.)

28 - 112 mm

35 - 210 mm

Aperture priority

Yes

Max. aperture

f3.1 - f6.5

f2.8 - f4.8

Max. aperture (35mm equiv.)

f17.6 - f37

f13.6 - f23.4

Metering

Matrix, Multi-segment

Centre weighted, Evaluative, Spot

Exposure compensation

±2 EV (in 1/3 EV steps)

Shutter priority

Yes

Min. shutter speed

8 sec

15 sec

Max. shutter speed

1/1600 sec

1/2500 sec

Built-in flash

External flash

Viewfinder

None

Optical (tunnel)

White balance presets

Screen size

2.7"

2.5"

Screen resolution

230,000 dots

207,000 dots

Video capture

Max. video resolution

Storage types

SDHC, SDXC, Secure Digital

Secure Digital

USB

USB 2.0 (480 Mbit/sec)

HDMI

Wireless

GPS

Battery

Li-Ion

Canon Lithium-Ion

Weight

113 g

320 g

Dimensions

98 x 56 x 21 mm

106.4 x 71.9 x 42.5 mm

Year

2012

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

Panasonic FS28 diagonal

The diagonal of FS28 sensor is not 1/2.33 or 0.43" (10.9 mm) as you might expect, but approximately two thirds of that value - 7.6 mm. If you want to know why, see sensor sizes.

w = 6.08 mm
h = 4.56 mm

Diagonal = √

6.08² + 4.56²

= 7.60 mm

Canon G7 diagonal

The diagonal of G7 sensor is not 1/1.8 or 0.56" (14.1 mm) as you might expect, but approximately two thirds of that value - 8.89 mm. If you want to know why, see sensor sizes.

w = 7.11 mm
h = 5.33 mm

Diagonal = √

7.11² + 5.33²

= 8.89 mm

Surface area

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

FS28 sensor area

Width = 6.08 mm
Height = 4.56 mm

Surface area = 6.08 × 4.56 = 27.72 mm²

G7 sensor area

Width = 7.11 mm
Height = 5.33 mm

Surface area = 7.11 × 5.33 = 37.90 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

FS28 pixel pitch

Sensor width = 6.08 mm
Sensor resolution width = 4330 pixels

Pixel pitch =	6.08	× 1000	= 1.4 µm
	4330

G7 pixel pitch

Sensor width = 7.11 mm
Sensor resolution width = 3647 pixels

Pixel pitch =	7.11	× 1000	= 1.95 µm
	3647

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

FS28 pixel area

Pixel pitch = 1.4 µm

Pixel area = 1.4² = 1.96 µm²

G7 pixel area

Pixel pitch = 1.95 µm

Pixel area = 1.95² = 3.8 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

FS28 pixel density

Sensor resolution width = 4330 pixels
Sensor width = 0.608 cm

Pixel density = (4330 / 0.608)² / 1000000 = 50.72 MP/cm²

G7 pixel density

Sensor resolution width = 3647 pixels
Sensor width = 0.711 cm

Pixel density = (3647 / 0.711)² / 1000000 = 26.31 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

FS28 sensor resolution

Sensor width = 6.08 mm
Sensor height = 4.56 mm
Effective megapixels = 14.10

r = 6.08/4.56 = 1.33

X = √	14.10 × 1000000	= 3256
	1.33

Resolution horizontal: X × r = 3256 × 1.33 = 4330
Resolution vertical: X = 3256

Sensor resolution = 4330 x 3256

G7 sensor resolution

Sensor width = 7.11 mm
Sensor height = 5.33 mm
Effective megapixels = 10.00

r = 7.11/5.33 = 1.33

X = √	10.00 × 1000000	= 2742
	1.33

Resolution horizontal: X × r = 2742 × 1.33 = 3647
Resolution vertical: X = 2742

Sensor resolution = 3647 x 2742

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

FS28 crop factor

Sensor diagonal in mm = 7.60 mm

Crop factor =	43.27	= 5.69
	7.60

G7 crop factor

Sensor diagonal in mm = 8.89 mm

Crop factor =	43.27	= 4.87
	8.89

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).

FS28 equivalent aperture

Crop factor = 5.69
Aperture = f3.1 - f6.5

35-mm equivalent aperture = (f3.1 - f6.5) × 5.69 = f17.6 - f37

G7 equivalent aperture

Crop factor = 4.87
Aperture = f2.8 - f4.8

35-mm equivalent aperture = (f2.8 - f4.8) × 4.87 = f13.6 - f23.4

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