Olympus TG-630 iHS vs. Olympus TG-320

Comparison

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TG-630 iHS image
vs
TG-320 image
Olympus TG-630 iHS Olympus TG-320
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Megapixels
12.00
14.00
Max. image resolution
3968 x 2976
4288 x 3216

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
3995 x 3004
4315 x 3244
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)
Olympus TG-630 iHS Olympus TG-320
Surface area:
28.46 mm² vs 28.46 mm²
Difference: 0 mm² (0%)
TG-630 iHS and TG-320 sensors are the same size.
Pixel pitch
1.54 µm
1.43 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: 0.11 µm (8%)
Pixel pitch of TG-630 iHS is approx. 8% higher than pixel pitch of TG-320.
Pixel area
2.37 µm²
2.04 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: 0.33 µm² (16%)
A pixel on Olympus TG-630 iHS sensor is approx. 16% bigger than a pixel on Olympus TG-320.
Pixel density
42.06 MP/cm²
49.07 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: 7.01 µm (17%)
Olympus TG-320 has approx. 17% higher pixel density than Olympus TG-630 iHS.
To learn about the accuracy of these numbers, click here.

Specs

Olympus TG-630 iHS
Olympus TG-320
Crop factor
5.62
5.62
Total megapixels
14.50
Effective megapixels
12.00
14.00
Optical zoom
5x
3.6x
Digital zoom
Yes
Yes
ISO sensitivity
Auto, High Auto, 100, 200, 400, 800, 1600, 3200, 6400
Auto, High Auto, 80, 100, 200, 400, 800, 1600
RAW
Manual focus
Normal focus range
50 cm
60 cm
Macro focus range
3 cm
3 cm
Focal length (35mm equiv.)
28 - 140 mm
28 - 102 mm
Aperture priority
No
No
Max. aperture
f3.9 - f5.9
f3.5 - f5.1
Max. aperture (35mm equiv.)
f21.9 - f33.2
f19.7 - f28.7
Metering
Multi, Spot
Multi, Spot
Exposure compensation
±2 EV (in 1/3 EV steps)
±2 EV (in 1/3 EV steps)
Shutter priority
No
No
Min. shutter speed
4 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
3"
2.7"
Screen resolution
460,000 dots
230,000 dots
Video capture
Max. video resolution
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
Lithium-ion rechargeable LI-50B battery
Lithium-ion rechargeable LI-42B battery
Weight
167 g
155 g
Dimensions
98.4 x 65.9 x 21.9 mm
96 x 63 x 23 mm
Year
2013
2012



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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

Olympus TG-630 iHS diagonal

The diagonal of TG-630 iHS 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

Olympus TG-320 diagonal

The diagonal of TG-320 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.

TG-630 iHS sensor area

Width = 6.16 mm
Height = 4.62 mm

Surface area = 6.16 × 4.62 = 28.46 mm²

TG-320 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

TG-630 iHS pixel pitch

Sensor width = 6.16 mm
Sensor resolution width = 3995 pixels
Pixel pitch =   6.16  × 1000  = 1.54 µm
3995

TG-320 pixel pitch

Sensor width = 6.16 mm
Sensor resolution width = 4315 pixels
Pixel pitch =   6.16  × 1000  = 1.43 µm
4315


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

TG-630 iHS pixel area

Pixel pitch = 1.54 µm

Pixel area = 1.54² = 2.37 µm²

TG-320 pixel area

Pixel pitch = 1.43 µm

Pixel area = 1.43² = 2.04 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

TG-630 iHS pixel density

Sensor resolution width = 3995 pixels
Sensor width = 0.616 cm

Pixel density = (3995 / 0.616)² / 1000000 = 42.06 MP/cm²

TG-320 pixel density

Sensor resolution width = 4315 pixels
Sensor width = 0.616 cm

Pixel density = (4315 / 0.616)² / 1000000 = 49.07 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

TG-630 iHS sensor resolution

Sensor width = 6.16 mm
Sensor height = 4.62 mm
Effective megapixels = 12.00
r = 6.16/4.62 = 1.33
X =  12.00 × 1000000  = 3004
1.33
Resolution horizontal: X × r = 3004 × 1.33 = 3995
Resolution vertical: X = 3004

Sensor resolution = 3995 x 3004

TG-320 sensor resolution

Sensor width = 6.16 mm
Sensor height = 4.62 mm
Effective megapixels = 14.00
r = 6.16/4.62 = 1.33
X =  14.00 × 1000000  = 3244
1.33
Resolution horizontal: X × r = 3244 × 1.33 = 4315
Resolution vertical: X = 3244

Sensor resolution = 4315 x 3244


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


TG-630 iHS crop factor

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

TG-320 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).

TG-630 iHS equivalent aperture

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

35-mm equivalent aperture = (f3.9 - f5.9) × 5.62 = f21.9 - f33.2

TG-320 equivalent aperture

Crop factor = 5.62
Aperture = f3.5 - f5.1

35-mm equivalent aperture = (f3.5 - f5.1) × 5.62 = f19.7 - f28.7

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