Canon PowerShot SX740 HS vs. Canon PowerShot SX30 IS

Comparison

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PowerShot SX740 HS image
vs
PowerShot SX30 IS image
Canon PowerShot SX740 HS Canon PowerShot SX30 IS
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Megapixels
20.30
14.10
Max. image resolution
5184 x 3888
4320 x 3240

Sensor

Sensor type
CMOS
CCD
Sensor size
1/2.3" (~ 6.16 x 4.62 mm)
1/2.3" (~ 6.16 x 4.62 mm)
Sensor resolution
5196 x 3907
4330 x 3256
Diagonal
7.70 mm
7.70 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
(ratio)
Canon PowerShot SX740 HS Canon PowerShot SX30 IS
Surface area:
28.46 mm² vs 28.46 mm²
Difference: 0 mm² (0%)
SX740 HS and SX30 IS sensors are the same size.
Note: You are comparing sensors of very different generations. There is a gap of 8 years between Canon SX740 HS (2018) and Canon SX30 IS (2010). Eight years is a lot of time in terms of technology, meaning newer sensors are overall much more efficient than the older ones.
Pixel pitch
1.19 µm
1.42 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: 0.23 µm (19%)
Pixel pitch of SX30 IS is approx. 19% higher than pixel pitch of SX740 HS.
Pixel area
1.42 µm²
2.02 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:
vs
Pixel area difference: 0.6 µm² (42%)
A pixel on Canon SX30 IS sensor is approx. 42% bigger than a pixel on Canon SX740 HS.
Pixel density
71.15 MP/cm²
49.41 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: 21.74 µm (44%)
Canon SX740 HS has approx. 44% higher pixel density than Canon SX30 IS.
To learn about the accuracy of these numbers, click here.

Specs

Canon SX740 HS
Canon SX30 IS
Crop factor
5.62
5.62
Total megapixels
21.10
Effective megapixels
20.30
14.10
Optical zoom
40x
35x
Digital zoom
Yes
Yes
ISO sensitivity
Auto, 100-3200
Auto, 80, 100, 200, 400, 800, 1600
RAW
Manual focus
Normal focus range
5 cm
35 cm
Macro focus range
1 cm
Focal length (35mm equiv.)
24 - 960 mm
24 - 840 mm
Aperture priority
Yes
Yes
Max. aperture
f3.3 - f6.9
f2.7 - f5.8
Max. aperture (35mm equiv.)
f18.5 - f38.8
f15.2 - f32.6
Metering
Multi, Center-weighted, Spot
Centre weighted, Multi-segment, Spot
Exposure compensation
±3 EV (in 1/3 EV steps)
±2 EV (in 1/3 EV steps)
Shutter priority
Yes
Yes
Min. shutter speed
15 sec
15 sec
Max. shutter speed
1/3200 sec
1/3200 sec
Built-in flash
External flash
Viewfinder
None
Electronic
White balance presets
5
7
Screen size
3"
2.7"
Screen resolution
921,600 dots
230,000 dots
Video capture
Max. video resolution
3840x2160 (30p/25p)
Storage types
SD/SDHC/SDXC
SDHC, SDXC, Secure Digital
USB
USB 2.0 (480 Mbit/sec)
USB 2.0 (480 Mbit/sec)
HDMI
Wireless
GPS
Battery
NB-13L lithium-ion battery
Lithium-Ion NB-7L rechargeable battery
Weight
299 g
601 g
Dimensions
110.1 x 63.8 x 39.9 mm
123 x 92 x 108 mm
Year
2018
2010



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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

Canon SX740 HS diagonal

The diagonal of SX740 HS 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

Canon SX30 IS diagonal

The diagonal of SX30 IS 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


Surface area

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

SX740 HS sensor area

Width = 6.16 mm
Height = 4.62 mm

Surface area = 6.16 × 4.62 = 28.46 mm²

SX30 IS sensor area

Width = 6.16 mm
Height = 4.62 mm

Surface area = 6.16 × 4.62 = 28.46 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

SX740 HS pixel pitch

Sensor width = 6.16 mm
Sensor resolution width = 5196 pixels
Pixel pitch =   6.16  × 1000  = 1.19 µm
5196

SX30 IS pixel pitch

Sensor width = 6.16 mm
Sensor resolution width = 4330 pixels
Pixel pitch =   6.16  × 1000  = 1.42 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

SX740 HS pixel area

Pixel pitch = 1.19 µm

Pixel area = 1.19² = 1.42 µm²

SX30 IS pixel area

Pixel pitch = 1.42 µm

Pixel area = 1.42² = 2.02 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

SX740 HS pixel density

Sensor resolution width = 5196 pixels
Sensor width = 0.616 cm

Pixel density = (5196 / 0.616)² / 1000000 = 71.15 MP/cm²

SX30 IS pixel density

Sensor resolution width = 4330 pixels
Sensor width = 0.616 cm

Pixel density = (4330 / 0.616)² / 1000000 = 49.41 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

SX740 HS sensor resolution

Sensor width = 6.16 mm
Sensor height = 4.62 mm
Effective megapixels = 20.30
r = 6.16/4.62 = 1.33
X =  20.30 × 1000000  = 3907
1.33
Resolution horizontal: X × r = 3907 × 1.33 = 5196
Resolution vertical: X = 3907

Sensor resolution = 5196 x 3907

SX30 IS sensor resolution

Sensor width = 6.16 mm
Sensor height = 4.62 mm
Effective megapixels = 14.10
r = 6.16/4.62 = 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


SX740 HS crop factor

Sensor diagonal in mm = 7.70 mm
Crop factor =   43.27  = 5.62
7.70

SX30 IS crop factor

Sensor diagonal in mm = 7.70 mm
Crop factor =   43.27  = 5.62
7.70

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).

SX740 HS equivalent aperture

Crop factor = 5.62
Aperture = f3.3 - f6.9

35-mm equivalent aperture = (f3.3 - f6.9) × 5.62 = f18.5 - f38.8

SX30 IS equivalent aperture

Crop factor = 5.62
Aperture = f2.7 - f5.8

35-mm equivalent aperture = (f2.7 - f5.8) × 5.62 = f15.2 - f32.6

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