Olympus X-15 vs. Kodak EasyShare ZD710

Comparison

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X-15 image
vs
EasyShare ZD710 image
Olympus X-15 Kodak EasyShare ZD710
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Megapixels
8.50
7.10
Max. image resolution
3264 x 2448
3072 x 2304

Sensor

Sensor type
CCD
CCD
Sensor size
1/2.35" (~ 6.03 x 4.52 mm)
1/2.5" (~ 5.75 x 4.32 mm)
Sensor resolution
3362 x 2528
3072 x 2310
Diagonal
7.54 mm
7.19 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 »
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1.1 : 1
(ratio)
Olympus X-15 Kodak EasyShare ZD710
Surface area:
27.26 mm² vs 24.84 mm²
Difference: 2.42 mm² (10%)
X-15 sensor is approx. 1.1x bigger than ZD710 sensor.
Pixel pitch
1.79 µm
1.87 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: 0.08 µm (4%)
Pixel pitch of ZD710 is approx. 4% higher than pixel pitch of X-15.
Pixel area
3.2 µm²
3.5 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: 0.3 µm² (9%)
A pixel on Kodak ZD710 sensor is approx. 9% bigger than a pixel on Olympus X-15.
Pixel density
31.09 MP/cm²
28.54 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: 2.55 µm (9%)
Olympus X-15 has approx. 9% higher pixel density than Kodak ZD710.
To learn about the accuracy of these numbers, click here.



Specs

Olympus X-15
Kodak ZD710
Crop factor
5.74
6.02
Total megapixels
Effective megapixels
Optical zoom
Yes
Yes
Digital zoom
Yes
Yes
ISO sensitivity
Auto, 64, 100, 200, 400, 800, 1000
Auto, 80, 100, 200, 400, 800, 1600
RAW
Manual focus
Normal focus range
60 cm
12 cm
Macro focus range
5 cm
Focal length (35mm equiv.)
36 - 108 mm
38 - 380 mm
Aperture priority
No
Yes
Max. aperture
f3.1 - f5.9
f2.8 - f3.7
Max. aperture (35mm equiv.)
f17.8 - f33.9
f16.9 - f22.3
Metering
ESP Digital
Centre weighted, Multi-pattern, Spot
Exposure compensation
±2 EV (in 1/3 EV steps)
±2 EV (in 1/3 EV steps)
Shutter priority
No
Yes
Min. shutter speed
4 sec
8 sec
Max. shutter speed
1/2000 sec
1/2000 sec
Built-in flash
External flash
Viewfinder
None
Electronic
White balance presets
6
5
Screen size
2,5"
2"
Screen resolution
154,000 dots
150,000 dots
Video capture
Max. video resolution
Storage types
xD Picture card
MultiMedia, Secure Digital
USB
USB 2.0 (480 Mbit/sec)
USB 2.0 (480 Mbit/sec)
HDMI
Wireless
GPS
Battery
Li-Ion
1x CR-V3, 2x AA
Weight
155 g
280 g
Dimensions
96 x 57 x 22 mm
97.8 x 77.5 x 72.6 mm
Year
2008
2007




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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 X-15 diagonal

The diagonal of X-15 sensor is not 1/2.35 or 0.43" (10.8 mm) as you might expect, but approximately two thirds of that value - 7.54 mm. If you want to know why, see sensor sizes.

w = 6.03 mm
h = 4.52 mm
Diagonal =  6.03² + 4.52²   = 7.54 mm

Kodak ZD710 diagonal

The diagonal of ZD710 sensor is not 1/2.5 or 0.4" (10.2 mm) as you might expect, but approximately two thirds of that value - 7.19 mm. If you want to know why, see sensor sizes.

w = 5.75 mm
h = 4.32 mm
Diagonal =  5.75² + 4.32²   = 7.19 mm


Surface area

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

X-15 sensor area

Width = 6.03 mm
Height = 4.52 mm

Surface area = 6.03 × 4.52 = 27.26 mm²

ZD710 sensor area

Width = 5.75 mm
Height = 4.32 mm

Surface area = 5.75 × 4.32 = 24.84 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

X-15 pixel pitch

Sensor width = 6.03 mm
Sensor resolution width = 3362 pixels
Pixel pitch =   6.03  × 1000  = 1.79 µm
3362

ZD710 pixel pitch

Sensor width = 5.75 mm
Sensor resolution width = 3072 pixels
Pixel pitch =   5.75  × 1000  = 1.87 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

X-15 pixel area

Pixel pitch = 1.79 µm

Pixel area = 1.79² = 3.2 µm²

ZD710 pixel area

Pixel pitch = 1.87 µm

Pixel area = 1.87² = 3.5 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

X-15 pixel density

Sensor resolution width = 3362 pixels
Sensor width = 0.603 cm

Pixel density = (3362 / 0.603)² / 1000000 = 31.09 MP/cm²

ZD710 pixel density

Sensor resolution width = 3072 pixels
Sensor width = 0.575 cm

Pixel density = (3072 / 0.575)² / 1000000 = 28.54 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

X-15 sensor resolution

Sensor width = 6.03 mm
Sensor height = 4.52 mm
Effective megapixels = 8.50
r = 6.03/4.52 = 1.33
X =  8.50 × 1000000  = 2528
1.33
Resolution horizontal: X × r = 2528 × 1.33 = 3362
Resolution vertical: X = 2528

Sensor resolution = 3362 x 2528

ZD710 sensor resolution

Sensor width = 5.75 mm
Sensor height = 4.32 mm
Effective megapixels = 7.10
r = 5.75/4.32 = 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


X-15 crop factor

Sensor diagonal in mm = 7.54 mm
Crop factor =   43.27  = 5.74
7.54

ZD710 crop factor

Sensor diagonal in mm = 7.19 mm
Crop factor =   43.27  = 6.02
7.19

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).

X-15 equivalent aperture

Crop factor = 5.74
Aperture = f3.1 - f5.9

35-mm equivalent aperture = (f3.1 - f5.9) × 5.74 = f17.8 - f33.9

ZD710 equivalent aperture

Crop factor = 6.02
Aperture = f2.8 - f3.7

35-mm equivalent aperture = (f2.8 - f3.7) × 6.02 = f16.9 - f22.3

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