Nikon Coolpix L18 vs. Kodak PixPro AZ251

Comparison

change cameras »
Coolpix L18 image
vs
PixPro AZ251 image
Nikon Coolpix L18 Kodak PixPro AZ251
check price » check price »
Megapixels
8.00
16.15
Max. image resolution
3264 x 2448
4608 x 3456

Sensor

Sensor type
CCD
CCD
Sensor size
1/2.5" (~ 5.75 x 4.32 mm)
1/2.3" (~ 6.16 x 4.62 mm)
Sensor resolution
3262 x 2453
4635 x 3485
Diagonal
7.19 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 : 1.15
(ratio)
Nikon Coolpix L18 Kodak PixPro AZ251
Surface area:
24.84 mm² vs 28.46 mm²
Difference: 3.62 mm² (15%)
AZ251 sensor is approx. 1.15x bigger than L18 sensor.
Note: You are comparing cameras of different generations. There is a 5 year gap between Nikon L18 (2008) and Kodak AZ251 (2013). All things being equal, newer sensor generations generally outperform the older.
Pixel pitch
1.76 µm
1.33 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: 0.43 µm (32%)
Pixel pitch of L18 is approx. 32% higher than pixel pitch of AZ251.
Pixel area
3.1 µm²
1.77 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: 1.33 µm² (75%)
A pixel on Nikon L18 sensor is approx. 75% bigger than a pixel on Kodak AZ251.
Pixel density
32.18 MP/cm²
56.62 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: 24.44 µm (76%)
Kodak AZ251 has approx. 76% higher pixel density than Nikon L18.
To learn about the accuracy of these numbers, click here.



Specs

Nikon L18
Kodak AZ251
Crop factor
6.02
5.62
Total megapixels
8.30
16.44
Effective megapixels
8.00
16.15
Optical zoom
3x
25x
Digital zoom
Yes
Yes
ISO sensitivity
Auto, 64 - 1600
Auto, 80, 100, 200, 400, 1600, 3200
RAW
Manual focus
Normal focus range
50 cm
60 cm
Macro focus range
15 cm
3 cm
Focal length (35mm equiv.)
35 - 105 mm
24 - 600 mm
Aperture priority
No
Yes
Max. aperture
f2.8 - f4.7
f3.7 - f6.2
Max. aperture (35mm equiv.)
f16.9 - f28.3
f20.8 - f34.8
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
Yes
Min. shutter speed
4 sec
30 sec
Max. shutter speed
1/1500 sec
1/2000 sec
Built-in flash
External flash
Viewfinder
None
None
White balance presets
5
6
Screen size
3"
3"
Screen resolution
230,000 dots
230,000 dots
Video capture
Max. video resolution
Storage types
SDHC, Secure Digital
SD/SDHC
USB
USB 2.0 (480 Mbit/sec)
USB 2.0 (480 Mbit/sec)
HDMI
Wireless
GPS
Battery
AA (2) batteries (NiMH recommended)
4 x AA Alkaline or NiMH batteries
Weight
125 g
354 g
Dimensions
95 x 61 x 29.5 mm
115 x 74.3 x 69 mm
Year
2008
2013




Choose cameras to compare

vs

Diagonal

Diagonal is calculated by the use of Pythagorean theorem:
Diagonal =  w² + h²
where w = sensor width and h = sensor height

Nikon L18 diagonal

The diagonal of L18 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

Kodak AZ251 diagonal

The diagonal of AZ251 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.

L18 sensor area

Width = 5.75 mm
Height = 4.32 mm

Surface area = 5.75 × 4.32 = 24.84 mm²

AZ251 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

L18 pixel pitch

Sensor width = 5.75 mm
Sensor resolution width = 3262 pixels
Pixel pitch =   5.75  × 1000  = 1.76 µm
3262

AZ251 pixel pitch

Sensor width = 6.16 mm
Sensor resolution width = 4635 pixels
Pixel pitch =   6.16  × 1000  = 1.33 µm
4635


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

L18 pixel area

Pixel pitch = 1.76 µm

Pixel area = 1.76² = 3.1 µm²

AZ251 pixel area

Pixel pitch = 1.33 µm

Pixel area = 1.33² = 1.77 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

L18 pixel density

Sensor resolution width = 3262 pixels
Sensor width = 0.575 cm

Pixel density = (3262 / 0.575)² / 1000000 = 32.18 MP/cm²

AZ251 pixel density

Sensor resolution width = 4635 pixels
Sensor width = 0.616 cm

Pixel density = (4635 / 0.616)² / 1000000 = 56.62 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

L18 sensor resolution

Sensor width = 5.75 mm
Sensor height = 4.32 mm
Effective megapixels = 8.00
r = 5.75/4.32 = 1.33
X =  8.00 × 1000000  = 2453
1.33
Resolution horizontal: X × r = 2453 × 1.33 = 3262
Resolution vertical: X = 2453

Sensor resolution = 3262 x 2453

AZ251 sensor resolution

Sensor width = 6.16 mm
Sensor height = 4.62 mm
Effective megapixels = 16.15
r = 6.16/4.62 = 1.33
X =  16.15 × 1000000  = 3485
1.33
Resolution horizontal: X × r = 3485 × 1.33 = 4635
Resolution vertical: X = 3485

Sensor resolution = 4635 x 3485


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


L18 crop factor

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

AZ251 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).

L18 equivalent aperture

Crop factor = 6.02
Aperture = f2.8 - f4.7

35-mm equivalent aperture = (f2.8 - f4.7) × 6.02 = f16.9 - f28.3

AZ251 equivalent aperture

Crop factor = 5.62
Aperture = f3.7 - f6.2

35-mm equivalent aperture = (f3.7 - f6.2) × 5.62 = f20.8 - f34.8

Enter your screen size (diagonal)

My screen size is  inches



Actual size is currently adjusted to screen.

If your screen (phone, tablet, or monitor) is not in diagonal, then the actual size of a sensor won't be shown correctly.