Olympus Stylus 1040 vs. Olympus Stylus 720 SW

Comparison

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Stylus 1040 image
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Stylus 720 SW image
Olympus Stylus 1040 Olympus Stylus 720 SW
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Megapixels
10.10
7.10
Max. image resolution
3648 x 2736
3072 x 2304

Sensor

Sensor type
CCD
CCD
Sensor size
1/2.33" (~ 6.08 x 4.56 mm)
1/2.3" (~ 6.16 x 4.62 mm)
Sensor resolution
3665 x 2756
3072 x 2310
Diagonal
7.60 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 : 1.03
(ratio)
Olympus Stylus 1040 Olympus Stylus 720 SW
Surface area:
27.72 mm² vs 28.46 mm²
Difference: 0.74 mm² (3%)
720 SW sensor is slightly bigger than 1040 sensor (only 3% difference).
Note: You are comparing cameras of different generations. There is a 2 year gap between Olympus 1040 (2008) and Olympus 720 SW (2006). All things being equal, newer sensor generations generally outperform the older.
Pixel pitch
1.66 µm
2.01 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: 0.35 µm (21%)
Pixel pitch of 720 SW is approx. 21% higher than pixel pitch of 1040.
Pixel area
2.76 µm²
4.04 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: 1.28 µm² (46%)
A pixel on Olympus 720 SW sensor is approx. 46% bigger than a pixel on Olympus 1040.
Pixel density
36.34 MP/cm²
24.87 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: 11.47 µm (46%)
Olympus 1040 has approx. 46% higher pixel density than Olympus 720 SW.
To learn about the accuracy of these numbers, click here.



Specs

Olympus 1040
Olympus 720 SW
Crop factor
5.69
5.62
Total megapixels
10.70
7.40
Effective megapixels
10.10
7.10
Optical zoom
3x
3x
Digital zoom
Yes
Yes
ISO sensitivity
Auto, (80 - 1600), 80, 100, 200, 400, 800, 1600
Auto, 64, 100, 200, 400, (800, 1600 with limitations)
RAW
Manual focus
Normal focus range
50 cm
60 cm
Macro focus range
7 cm
8 cm
Focal length (35mm equiv.)
38 - 114 mm
37 - 111 mm
Aperture priority
No
No
Max. aperture
f3.5 - f5.0
f3.4 - f5.7
Max. aperture (35mm equiv.)
f19.9 - f28.5
f19.1 - f32
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
1 sec
4 sec
Max. shutter speed
1/1000 sec
1/1000 sec
Built-in flash
External flash
Viewfinder
None
None
White balance presets
6
5
Screen size
2.7"
2.5"
Screen resolution
230,000 dots
115,000 dots
Video capture
Max. video resolution
Storage types
xD Picture Card, Internal
xD Picture Card, Internal
USB
USB 2.0 (480 Mbit/sec)
USB 1.0
HDMI
Wireless
GPS
Battery
Lithium-Ion (LI-50B)
Lithium-Ion rechargeable
Weight
148 g
190 g
Dimensions
89 x 56 x 20 mm
95 x 56 x 20 mm
Year
2008
2006




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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 1040 diagonal

The diagonal of 1040 sensor is not 1/2.33 or 0.43" (10.9 mm) as you might expect, but approximately two thirds of that value - 7.6 mm. If you want to know why, see sensor sizes.

w = 6.08 mm
h = 4.56 mm
Diagonal =  6.08² + 4.56²   = 7.60 mm

Olympus 720 SW diagonal

The diagonal of 720 SW 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.

1040 sensor area

Width = 6.08 mm
Height = 4.56 mm

Surface area = 6.08 × 4.56 = 27.72 mm²

720 SW 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

1040 pixel pitch

Sensor width = 6.08 mm
Sensor resolution width = 3665 pixels
Pixel pitch =   6.08  × 1000  = 1.66 µm
3665

720 SW pixel pitch

Sensor width = 6.16 mm
Sensor resolution width = 3072 pixels
Pixel pitch =   6.16  × 1000  = 2.01 µm
3072


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

1040 pixel area

Pixel pitch = 1.66 µm

Pixel area = 1.66² = 2.76 µm²

720 SW pixel area

Pixel pitch = 2.01 µm

Pixel area = 2.01² = 4.04 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

1040 pixel density

Sensor resolution width = 3665 pixels
Sensor width = 0.608 cm

Pixel density = (3665 / 0.608)² / 1000000 = 36.34 MP/cm²

720 SW pixel density

Sensor resolution width = 3072 pixels
Sensor width = 0.616 cm

Pixel density = (3072 / 0.616)² / 1000000 = 24.87 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

1040 sensor resolution

Sensor width = 6.08 mm
Sensor height = 4.56 mm
Effective megapixels = 10.10
r = 6.08/4.56 = 1.33
X =  10.10 × 1000000  = 2756
1.33
Resolution horizontal: X × r = 2756 × 1.33 = 3665
Resolution vertical: X = 2756

Sensor resolution = 3665 x 2756

720 SW sensor resolution

Sensor width = 6.16 mm
Sensor height = 4.62 mm
Effective megapixels = 7.10
r = 6.16/4.62 = 1.33
X =  7.10 × 1000000  = 2310
1.33
Resolution horizontal: X × r = 2310 × 1.33 = 3072
Resolution vertical: X = 2310

Sensor resolution = 3072 x 2310


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


1040 crop factor

Sensor diagonal in mm = 7.60 mm
Crop factor =   43.27  = 5.69
7.60

720 SW 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).

1040 equivalent aperture

Crop factor = 5.69
Aperture = f3.5 - f5.0

35-mm equivalent aperture = (f3.5 - f5.0) × 5.69 = f19.9 - f28.5

720 SW equivalent aperture

Crop factor = 5.62
Aperture = f3.4 - f5.7

35-mm equivalent aperture = (f3.4 - f5.7) × 5.62 = f19.1 - f32

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