Olympus TG-630 iHS vs. Olympus TG-320

Comparison

TG-630 iHS image
vs.
TG-320 image

Comparison

Olympus TG-630 iHS Olympus TG-320
Megapixels
12.00 14.00
Max. resolution
3968 x 2976 4288 x 3216
Price
Amazon, B&H Photo, Adorama Amazon, B&H Photo, Adorama

Sensor

Sensor type
BSI 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 
Surface area
28.46 mm²  28.46 mm² 
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 sizes:
Olympus TG-630 iHS
vs.
Olympus TG-320
 
Surface area:
Olympus TG-630 iHS
Olympus TG-320
Difference: 0 mm² (0%)
Olympus TG-630 iHS and Olympus TG-320 have the same surface area.
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.
Pixel pitch
Olympus TG-630 iHS
Olympus TG-320
Difference: 0.11 µm (8%)
Pixel pitch of Olympus TG-630 iHS is approx. 8% higher than pixel pitch of Olympus 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:
Olympus TG-630 iHS
vs.
Olympus TG-320
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.
Pixel density
Olympus TG-630 iHS
Olympus TG-320
Difference: 7.01 MP/cm² (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.

Other specifications

Crop factor
5.62  5.62 
Total megapixels
n/a 14.50
Effective megapixels
12.00 14.00
Optical zoom
5x 3.6x
Digital zoom
Yes Yes
Iso
Auto, High Auto, 100, 200, 400, 800, 1600, 3200, 6400 Auto, High Auto, 80, 100, 200, 400, 800, 1600
Auto focus
Yes Yes
Manual focus
No No
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
Aperture
f3.9 - f5.9 f3.5 - f5.1
Aperture (35mm equiv.)
f21.9 - f33.2  f19.7 - f28.7 
Metering
Multi, Spot Multi, Spot
Exposure compensation
±2 EV (at 1/3 EV steps) ±2 EV (at 1/3 EV steps)
Shutter priority
No No
Min. shutter speed
4 sec 4 sec
Max. shutter speed
1/2000 sec 1/2000 sec
Flash modes
Auto, On, Off, Red-Eye, Fill-in Auto, On, Off, Red-Eye, Fill-in
Built-in flash
Yes Yes
External flash
No No
Viewfinder
None None
White balance presets
5 5
LCD display
Yes Yes
LCD size
3" 2.7"
LCD resolution
460,000 230,000
Min. image resolution
640 x 480 640 x 480
Selftimer
Yes Yes
Storage types
SD/SDHC/SDXC SD/SDHC/SDXC
USB
USB 2.0 (480 Mbit/sec) USB 2.0 (480 Mbit/sec)
Batteries
Lithium-ion rechargeable LI-50B battery & charger Lithium-ion rechargeable LI-42B battery & charger
Weight
167 g 155g
Dimensions
98.4 x 65.9 x 21.9 mm 96x63x23 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 Olympus TG-630 iHS image sensor is not 1/2.3 inch as you might expect, but approximately two thirds of that value. 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 Olympus TG-320 image sensor is not 1/2.3 inch as you might expect, but approximately two thirds of that value. 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.

Olympus TG-630 iHS surface area

Width = 6.16 mm
Height = 4.62 mm

Surface area = 6.16 × 4.62 = 28.46 mm²

Olympus TG-320 surface 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

Olympus TG-630 iHS pixel pitch

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

Olympus 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

Olympus TG-630 iHS pixel area

Pixel pitch = 1.54 µm

Pixel area = 1.54² = 2.37 µm²

Olympus 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

You could also use this formula:
Pixel density =   effective megapixels × 1000000  / 10000
sensor surface area in mm²

Olympus 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

Olympus 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. 22.8 × 15.5 sensor for example has a ratio of 1.47.

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

Olympus 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

Olympus 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


Olympus TG-630 iHS crop factor

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

Olympus 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).

Olympus 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

Olympus 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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