Kodak EasyShare Z915 vs. Sony Cyber-shot DSC-RX1

Comparison

EasyShare Z915 image
vs.
Cyber-shot DSC-RX1 image

 

Kodak EasyShare Z915 Sony Cyber-shot DSC-RX1
Megapixels
10.00 24.30
Max. resolution
3648 x 2736 6000 x 4000
Price
Amazon, B&H Photo, Adorama Amazon, B&H Photo, Adorama

Sensor

Sensor type
CCD CMOS
Sensor size
1/2.3" (~ 6.16 x 4.62 mm) 35.8 x 23.9 mm
Sensor resolution
3647 x 2742  6038 x 4025 
Diagonal
7.70 mm  43.04 mm 
Surface area
28.46 mm²  855.62 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:
Kodak EasyShare Z915
vs.
Sony Cyber-shot DSC-RX1
 
Surface area:
Kodak EasyShare Z915
Sony Cyber-shot DSC-RX1
Difference: 827.16 mm² (2906%)
Sony Cyber-shot DSC-RX1 has approx. 2906% more surface area than Kodak EasyShare Z915.
Note: You are comparing cameras of different generations. There is a 3 year gap between Kodak EasyShare Z915 (2009) and Sony Cyber-shot DSC-RX1 (2012). All things being equal, newer sensor generations generally outperform the older.
Pixel pitch
1.69 µm  5.93 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
Kodak EasyShare Z915
Sony Cyber-shot DSC-RX1
Difference: 4.24 µm (251%)
Pixel pitch of Sony Cyber-shot DSC-RX1 is approx. 251% higher than pixel pitch of Kodak EasyShare Z915.
Pixel area
2.86 µm²  35.16 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:
Kodak EasyShare Z915
vs.
Sony Cyber-shot DSC-RX1
Pixel area difference: 32.3 µm² (1129%)
A pixel on Sony Cyber-shot DSC-RX1 sensor is approx. 1129% bigger than a pixel on Kodak EasyShare Z915.
Pixel density
35.05 MP/cm²  2.84 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
Kodak EasyShare Z915
Sony Cyber-shot DSC-RX1
Difference: 32.21 MP/cm² (1134%)
Kodak EasyShare Z915 has approx. 1134% higher pixel density than Sony Cyber-shot DSC-RX1.
To learn about the accuracy of these numbers, click here.

Other specifications

Crop factor
5.62  1.01 
Total megapixels
n/a 24.70
Effective megapixels
10.00 24.30
Optical zoom
10x 1x
Digital zoom
Yes Yes
Iso
Auto, 100, 200, 400, 800, 1600 Auto, 100, 200, 400, 800, 1600, 3200, 6400, 12800, 25600
Auto focus
Yes Yes
Manual focus
No Yes
Normal focus range
60 cm 25 cm
Macro focus range
10 cm n/a
Focal length (35mm equiv.)
35 - 350 mm 35
Aperture priority
Yes Yes
Aperture
f3.5 - f4.8 f2.0
Aperture (35mm equiv.)
f19.7 - f27  f2 
Metering
Centre weighted, Multi-pattern, Spot Multi, Center-weighted, Spot
Exposure compensation
-2EV - +2EV with 1/3EV steps ±3 EV (at 1/3 EV steps)
Shutter priority
Yes Yes
Min. shutter speed
16 sec 30 sec
Max. shutter speed
1/1250 sec 1/2000 sec
Flash modes
Anti red-eye, Auto, Fill in, Off Auto, On, Off, Slow Sync
Built-in flash
Yes Yes
External flash
No Yes
Viewfinder
None Electronic and Optical (optional)
White balance presets
5 9
LCD display
Yes Yes
LCD size
2.5" 3"
LCD resolution
230,000 1,229,000
Min. image resolution
1280 x 960 2640 x 1488
Selftimer
Yes Yes
Storage types
SDHC, Secure Digital SD/SDHC/SDXC, Memory Stick Duo/Pro Duo/Pro-HG Duo
USB
USB 2.0 (480 Mbit/sec) USB 2.0 (480 Mbit/sec)
Batteries
2 x AA batteries (NiMH) Lithium-Ion NP-BX1 battery and charger
Weight
220g 482 g
Dimensions
107x72.4x35.7 mm 113 x 65 x 70 mm
Year
2009 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

Kodak EasyShare Z915 diagonal

The diagonal of Kodak EasyShare Z915 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

Sony Cyber-shot DSC-RX1 diagonal

w = 35.80 mm
h = 23.90 mm
Diagonal =  35.80² + 23.90²   = 43.04 mm


Surface area

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

Kodak EasyShare Z915 surface area

Width = 6.16 mm
Height = 4.62 mm

Surface area = 6.16 × 4.62 = 28.46 mm²

Sony Cyber-shot DSC-RX1 surface area

Width = 35.80 mm
Height = 23.90 mm

Surface area = 35.80 × 23.90 = 855.62 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

Kodak EasyShare Z915 pixel pitch

Sensor width = 6.16 mm
Sensor resolution width = 3647 pixels
Pixel pitch =   6.16  × 1000  = 1.69 µm
3647

Sony Cyber-shot DSC-RX1 pixel pitch

Sensor width = 35.80 mm
Sensor resolution width = 6038 pixels
Pixel pitch =   35.80  × 1000  = 5.93 µm
6038


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

Kodak EasyShare Z915 pixel area

Pixel pitch = 1.69 µm

Pixel area = 1.69² = 2.86 µm²

Sony Cyber-shot DSC-RX1 pixel area

Pixel pitch = 5.93 µm

Pixel area = 5.93² = 35.16 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

Kodak EasyShare Z915 pixel density

Sensor resolution width = 3647 pixels
Sensor width = 0.616 cm

Pixel density = (3647 / 0.616)² / 1000000 = 35.05 MP/cm²

Sony Cyber-shot DSC-RX1 pixel density

Sensor resolution width = 6038 pixels
Sensor width = 3.58 cm

Pixel density = (6038 / 3.58)² / 1000000 = 2.84 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

Kodak EasyShare Z915 sensor resolution

Sensor width = 6.16 mm
Sensor height = 4.62 mm
Effective megapixels = 10.00
r = 6.16/4.62 = 1.33
X =  10.00 × 1000000  = 2742
1.33
Resolution horizontal: X × r = 2742 × 1.33 = 3647
Resolution vertical: X = 2742

Sensor resolution = 3647 x 2742

Sony Cyber-shot DSC-RX1 sensor resolution

Sensor width = 35.80 mm
Sensor height = 23.90 mm
Effective megapixels = 24.30
r = 35.80/23.90 = 1.5
X =  24.30 × 1000000  = 4025
1.5
Resolution horizontal: X × r = 4025 × 1.5 = 6038
Resolution vertical: X = 4025

Sensor resolution = 6038 x 4025


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


Kodak EasyShare Z915 crop factor

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

Sony Cyber-shot DSC-RX1 crop factor

Sensor diagonal in mm = 43.04 mm
Crop factor =   43.27  = 1.01
43.04

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).

Kodak EasyShare Z915 equivalent aperture

Crop factor = 5.62
Aperture = f3.5 - f4.8

35-mm equivalent aperture = (f3.5 - f4.8) × 5.62 = f19.7 - f27

Sony Cyber-shot DSC-RX1 equivalent aperture

Crop factor = 1.01
Aperture = f2.0

35-mm equivalent aperture = (f2.0) × 1.01 = f2


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