Panasonic Lumix DMC-FH25 vs. Panasonic Lumix DMC-SZ7

Comparison

change cameras »

Panasonic Lumix DMC-FH25

Panasonic Lumix DMC-SZ7

check price »

Megapixels

16.10

14.10

Max. image resolution

4608 x 3456

4320 x 3240

Sensor

Sensor type

CCD

CMOS

Sensor size

1/2.3" (~ 6.16 x 4.62 mm)

1/2.33" (~ 6.08 x 4.56 mm)

Sensor resolution

4627 x 3479

4330 x 3256

Diagonal

7.70 mm

7.60 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
1.03	:	1
(ratio)

Panasonic Lumix DMC-FH25		Panasonic Lumix DMC-SZ7

Surface area:

28.46 mm²

27.72 mm²

Difference: 0.74 mm² (3%)

FH25 sensor is slightly bigger than SZ7 sensor (only 3% difference).

Pixel pitch

1.33 µm

1.4 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: 0.07 µm (5%)

Pixel pitch of SZ7 is approx. 5% higher than pixel pitch of FH25.

Pixel area

1.77 µm²

1.96 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: 0.19 µm² (11%)

A pixel on Panasonic SZ7 sensor is approx. 11% bigger than a pixel on Panasonic FH25.

Pixel density

56.42 MP/cm²

50.72 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: 5.7 µm (11%)

Panasonic FH25 has approx. 11% higher pixel density than Panasonic SZ7.

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

Specs

Panasonic FH25

Panasonic SZ7

Crop factor

5.62

5.69

Total megapixels

16.60

15.30

Effective megapixels

16.10

14.10

Optical zoom

10x

Digital zoom

Yes

ISO sensitivity

Auto, 100, 200, 400, 800, 1600 - 6400

Auto, 100 - 3200

RAW

Manual focus

Normal focus range

50 cm

Macro focus range

5 cm

Focal length (35mm equiv.)

28 - 224 mm

25 - 250 mm

Aperture priority

Max. aperture

f3.3 - f5.9

f3.1 - f5.9

Max. aperture (35mm equiv.)

f18.5 - f33.2

f17.6 - f33.6

Metering

Intelligent Multiple

Matrix, Multi-segment

Exposure compensation

±2 EV (in 1/3 EV steps)

Shutter priority

Min. shutter speed

8 sec

Max. shutter speed

1/1600 sec

Built-in flash

External flash

Viewfinder

None

White balance presets

Screen size

2.7"

Screen resolution

230,000 dots

460,000 dots

Video capture

Max. video resolution

Storage types

SDHC, SDXC, Secure Digital

USB

USB 2.0 (480 Mbit/sec)

HDMI

Wireless

GPS

Battery

Lithium-Ion rechargeable battery

Weight

159 g

133 g

Dimensions

99.2 x 56.5 x 27.8 mm

99 x 59 x 21 mm

Year

2011

2012

Choose cameras to compare

Popular comparisons:

Diagonal

Diagonal is calculated by the use of Pythagorean theorem:

Diagonal = √

w² + h²

where w = sensor width and h = sensor height

Panasonic FH25 diagonal

The diagonal of FH25 sensor is not 1/2.3 or 0.43" (11 mm) as you might expect, but approximately two thirds of that value - 7.7 mm. If you want to know why, see sensor sizes.

w = 6.16 mm
h = 4.62 mm

Diagonal = √

6.16² + 4.62²

= 7.70 mm

Panasonic SZ7 diagonal

The diagonal of SZ7 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

Surface area

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

FH25 sensor area

Width = 6.16 mm
Height = 4.62 mm

Surface area = 6.16 × 4.62 = 28.46 mm²

SZ7 sensor area

Width = 6.08 mm
Height = 4.56 mm

Surface area = 6.08 × 4.56 = 27.72 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

FH25 pixel pitch

Sensor width = 6.16 mm
Sensor resolution width = 4627 pixels

Pixel pitch =	6.16	× 1000	= 1.33 µm
	4627

SZ7 pixel pitch

Sensor width = 6.08 mm
Sensor resolution width = 4330 pixels

Pixel pitch =	6.08	× 1000	= 1.4 µm
	4330

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

FH25 pixel area

Pixel pitch = 1.33 µm

Pixel area = 1.33² = 1.77 µm²

SZ7 pixel area

Pixel pitch = 1.4 µm

Pixel area = 1.4² = 1.96 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

FH25 pixel density

Sensor resolution width = 4627 pixels
Sensor width = 0.616 cm

Pixel density = (4627 / 0.616)² / 1000000 = 56.42 MP/cm²

SZ7 pixel density

Sensor resolution width = 4330 pixels
Sensor width = 0.608 cm

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

FH25 sensor resolution

Sensor width = 6.16 mm
Sensor height = 4.62 mm
Effective megapixels = 16.10

r = 6.16/4.62 = 1.33

X = √	16.10 × 1000000	= 3479
	1.33

Resolution horizontal: X × r = 3479 × 1.33 = 4627
Resolution vertical: X = 3479

Sensor resolution = 4627 x 3479

SZ7 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

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

FH25 crop factor

Sensor diagonal in mm = 7.70 mm

Crop factor =	43.27	= 5.62
	7.70

SZ7 crop factor

Sensor diagonal in mm = 7.60 mm

Crop factor =	43.27	= 5.69
	7.60

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).

FH25 equivalent aperture

Crop factor = 5.62
Aperture = f3.3 - f5.9

35-mm equivalent aperture = (f3.3 - f5.9) × 5.62 = f18.5 - f33.2

SZ7 equivalent aperture

Crop factor = 5.69
Aperture = f3.1 - f5.9

35-mm equivalent aperture = (f3.1 - f5.9) × 5.69 = f17.6 - f33.6

Enter your screen size (diagonal)

My screen size is inches

Actual size is currently adjusted to screen.

If your screen (phone, tablet, or monitor) is not in diagonal, then the actual size of a sensor won't be shown correctly.