Canon IXUS 170 vs. Nikon Coolpix S33

Comparison

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IXUS 170 image
vs
Coolpix S33 image
Canon IXUS 170 Nikon Coolpix S33
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Megapixels
20.00
13.20
Max. image resolution
5152 x 3864
4160 x 3120

Sensor

Sensor type
CCD
CMOS
Sensor size
1/2.3" (~ 6.16 x 4.62 mm)
1/3" (~ 4.8 x 3.6 mm)
Sensor resolution
5158 x 3878
4190 x 3150
Diagonal
7.70 mm
6.00 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
1.65 : 1
(ratio)
Canon IXUS 170 Nikon Coolpix S33
Surface area:
28.46 mm² vs 17.28 mm²
Difference: 11.18 mm² (65%)
IXUS 170 sensor is approx. 1.65x bigger than S33 sensor.
Pixel pitch
1.19 µm
1.15 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: 0.04 µm (3%)
Pixel pitch of IXUS 170 is approx. 3% higher than pixel pitch of S33.
Pixel area
1.42 µm²
1.32 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: 0.1 µm² (8%)
A pixel on Canon IXUS 170 sensor is approx. 8% bigger than a pixel on Nikon S33.
Pixel density
70.11 MP/cm²
76.2 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: 6.09 µm (9%)
Nikon S33 has approx. 9% higher pixel density than Canon IXUS 170.
To learn about the accuracy of these numbers, click here.



Specs

Canon IXUS 170
Nikon S33
Crop factor
5.62
7.21
Total megapixels
20.50
14.17
Effective megapixels
20.00
13.20
Optical zoom
12x
3x
Digital zoom
Yes
Yes
ISO sensitivity
Auto, 100-1600
Auto, 125-1600
RAW
Manual focus
Normal focus range
5 cm
5 cm
Macro focus range
1 cm
5 cm
Focal length (35mm equiv.)
25 - 300 mm
30 - 90 mm
Aperture priority
No
No
Max. aperture
f3.6 - f7.0
f3.3 - f5.9
Max. aperture (35mm equiv.)
f20.2 - f39.3
f23.8 - f42.5
Metering
Multi, Center-weighted, Spot
Multi, Center-weighted, Spot
Exposure compensation
±2 EV (in 1/3 EV steps)
±2 EV (in 1/3 EV steps)
Shutter priority
No
No
Min. shutter speed
15 sec
4 sec
Max. shutter speed
1/2000 sec
1/2000 sec
Built-in flash
External flash
Viewfinder
None
None
White balance presets
5
5
Screen size
2.7"
2.7"
Screen resolution
230,000 dots
230,000 dots
Video capture
Max. video resolution
1280x720 (25p)
1920x1080 (30p)
Storage types
SD/SDHC/SDXC
SD/SDHC/SDXC
USB
USB 2.0 (480 Mbit/sec)
USB 2.0 (480 Mbit/sec)
HDMI
Wireless
GPS
Battery
Li-ion Battery NB-11L/ NB-11LH
Li-ion Battery EN-EL19
Weight
141 g
180 g
Dimensions
99.6 x 57.6 x 22.6 mm
109.5 x 67 x 37.6 mm
Year
2015
2015




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vs

Diagonal

Diagonal is calculated by the use of Pythagorean theorem:
Diagonal =  w² + h²
where w = sensor width and h = sensor height

Canon IXUS 170 diagonal

The diagonal of IXUS 170 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

Nikon S33 diagonal

The diagonal of S33 sensor is not 1/3 or 0.33" (8.5 mm) as you might expect, but approximately two thirds of that value - 6 mm. If you want to know why, see sensor sizes.

w = 4.80 mm
h = 3.60 mm
Diagonal =  4.80² + 3.60²   = 6.00 mm


Surface area

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

IXUS 170 sensor area

Width = 6.16 mm
Height = 4.62 mm

Surface area = 6.16 × 4.62 = 28.46 mm²

S33 sensor area

Width = 4.80 mm
Height = 3.60 mm

Surface area = 4.80 × 3.60 = 17.28 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

IXUS 170 pixel pitch

Sensor width = 6.16 mm
Sensor resolution width = 5158 pixels
Pixel pitch =   6.16  × 1000  = 1.19 µm
5158

S33 pixel pitch

Sensor width = 4.80 mm
Sensor resolution width = 4190 pixels
Pixel pitch =   4.80  × 1000  = 1.15 µm
4190


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

IXUS 170 pixel area

Pixel pitch = 1.19 µm

Pixel area = 1.19² = 1.42 µm²

S33 pixel area

Pixel pitch = 1.15 µm

Pixel area = 1.15² = 1.32 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

IXUS 170 pixel density

Sensor resolution width = 5158 pixels
Sensor width = 0.616 cm

Pixel density = (5158 / 0.616)² / 1000000 = 70.11 MP/cm²

S33 pixel density

Sensor resolution width = 4190 pixels
Sensor width = 0.48 cm

Pixel density = (4190 / 0.48)² / 1000000 = 76.2 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

IXUS 170 sensor resolution

Sensor width = 6.16 mm
Sensor height = 4.62 mm
Effective megapixels = 20.00
r = 6.16/4.62 = 1.33
X =  20.00 × 1000000  = 3878
1.33
Resolution horizontal: X × r = 3878 × 1.33 = 5158
Resolution vertical: X = 3878

Sensor resolution = 5158 x 3878

S33 sensor resolution

Sensor width = 4.80 mm
Sensor height = 3.60 mm
Effective megapixels = 13.20
r = 4.80/3.60 = 1.33
X =  13.20 × 1000000  = 3150
1.33
Resolution horizontal: X × r = 3150 × 1.33 = 4190
Resolution vertical: X = 3150

Sensor resolution = 4190 x 3150


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


IXUS 170 crop factor

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

S33 crop factor

Sensor diagonal in mm = 6.00 mm
Crop factor =   43.27  = 7.21
6.00

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).

IXUS 170 equivalent aperture

Crop factor = 5.62
Aperture = f3.6 - f7.0

35-mm equivalent aperture = (f3.6 - f7.0) × 5.62 = f20.2 - f39.3

S33 equivalent aperture

Crop factor = 7.21
Aperture = f3.3 - f5.9

35-mm equivalent aperture = (f3.3 - f5.9) × 7.21 = f23.8 - f42.5

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