HP Photosmart 435 vs. Yakumo Mega Image IV

Comparison

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HP Photosmart 435

Yakumo Mega Image IV

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Megapixels

3.34

2.00

Max. image resolution

2048 x 1536

2304 x 1728

Sensor

Sensor type

CCD

CMOS

Sensor size

1/2.7" (~ 5.33 x 4 mm)

1/1.8" (~ 7.11 x 5.33 mm)

Sensor resolution

2108 x 1585

1631 x 1226

Diagonal

6.66 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	:	1.78
(ratio)

HP Photosmart 435		Yakumo Mega Image IV

Surface area:

21.32 mm²

37.90 mm²

Difference: 16.58 mm² (78%)

IV sensor is approx. 1.78x bigger than 435 sensor.

Pixel pitch

2.53 µm

4.36 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: 1.83 µm (72%)

Pixel pitch of IV is approx. 72% higher than pixel pitch of 435.

Pixel area

6.4 µm²

19.01 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: 12.61 µm² (197%)

A pixel on Yakumo IV sensor is approx. 197% bigger than a pixel on HP 435.

Pixel density

15.64 MP/cm²

5.26 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: 10.38 µm (197%)

HP 435 has approx. 197% higher pixel density than Yakumo IV.

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

Specs

HP 435

Yakumo IV

Crop factor

6.5

4.87

Total megapixels

Effective megapixels

Optical zoom

Digital zoom

Yes

ISO sensitivity

Auto, 100, 200, 400

Auto

RAW

Manual focus

Normal focus range

85 cm

160 cm

Macro focus range

85 cm

55 cm

Focal length (35mm equiv.)

36 mm

Aperture priority

Max. aperture

f2.8

Max. aperture (35mm equiv.)

f26

f13.6

Metering

Centre weighted

Exposure compensation

±2 EV (in 1/2 EV steps)

Shutter priority

Min. shutter speed

1 sec

Max. shutter speed

1/1000 sec

Built-in flash

External flash

Viewfinder

Optical (tunnel)

Optical

White balance presets

Screen size

1.5"

Screen resolution

61,600 dots

63,360 dots

Video capture

Max. video resolution

Storage types

MultiMedia, Secure Digital

Secure Digital

USB

USB 1.0

USB 1.1

HDMI

Wireless

GPS

Battery

AA (2) batteries (NiMH recommended)

2x AA

Weight

133 g

120 g

Dimensions

116.7 x 57.2 x 39.1 mm

94 x 61 x 40 mm

Year

2003

2002

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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

HP 435 diagonal

The diagonal of 435 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

Yakumo IV diagonal

The diagonal of IV 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.

435 sensor area

Width = 5.33 mm
Height = 4.00 mm

Surface area = 5.33 × 4.00 = 21.32 mm²

IV 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

435 pixel pitch

Sensor width = 5.33 mm
Sensor resolution width = 2108 pixels

Pixel pitch =	5.33	× 1000	= 2.53 µm
	2108

IV pixel pitch

Sensor width = 7.11 mm
Sensor resolution width = 1631 pixels

Pixel pitch =	7.11	× 1000	= 4.36 µm
	1631

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

435 pixel area

Pixel pitch = 2.53 µm

Pixel area = 2.53² = 6.4 µm²

IV pixel area

Pixel pitch = 4.36 µm

Pixel area = 4.36² = 19.01 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

435 pixel density

Sensor resolution width = 2108 pixels
Sensor width = 0.533 cm

Pixel density = (2108 / 0.533)² / 1000000 = 15.64 MP/cm²

IV pixel density

Sensor resolution width = 1631 pixels
Sensor width = 0.711 cm

Pixel density = (1631 / 0.711)² / 1000000 = 5.26 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

435 sensor resolution

Sensor width = 5.33 mm
Sensor height = 4.00 mm
Effective megapixels = 3.34

r = 5.33/4.00 = 1.33

X = √	3.34 × 1000000	= 1585
	1.33

Resolution horizontal: X × r = 1585 × 1.33 = 2108
Resolution vertical: X = 1585

Sensor resolution = 2108 x 1585

IV sensor resolution

Sensor width = 7.11 mm
Sensor height = 5.33 mm
Effective megapixels = 2.00

r = 7.11/5.33 = 1.33

X = √	2.00 × 1000000	= 1226
	1.33

Resolution horizontal: X × r = 1226 × 1.33 = 1631
Resolution vertical: X = 1226

Sensor resolution = 1631 x 1226

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

435 crop factor

Sensor diagonal in mm = 6.66 mm

Crop factor =	43.27	= 6.5
	6.66

IV 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).

435 equivalent aperture

Crop factor = 6.5
Aperture = f4

35-mm equivalent aperture = (f4) × 6.5 = f26

IV equivalent aperture

Crop factor = 4.87
Aperture = f2.8

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

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