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Koolu old
 

 

 

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Source page: http://commons.wikimedia.org/wiki/File:Koolu_old.jpg
Description I am hoping to combine cheap Koolu hardware with webconverger.com/
Date 26 August 2007(2007-08-26), 10:06
Source Koolu
Author Kai Hendry from London, UK
U.S. quarter

This image has currency in it to indicate scale.

Avoid using objects such as coins for scale, as they will require people unfamiliar with them to look up the dimensions or guess, both of which defeat the purpose of the object in the first place. Coins are particularly bad as they can reinforce a geographical bias, and some coins' designs are copyrighted.

Ideally, a photograph should include a ruler with the subject (as seen in this photo) or add a scale marking via an image editor instead (as seen in this photo). SI ("metric") units are the most commonly used worldwide (see metre, 1 E-2 m).

Examples of bad practice: here.

A tape measure


Common coin diameters for reference:

  • U.S. dollar:
    • 1¢: 19.05 mm , 0.75 in
    • 5¢: 21.21 mm , 0.79 in
    • 10¢: 17.91 mm , 0.71 in
    • 25¢: 24.26 mm , 0.94 in
    • 50¢: 30.61 mm , 1.22 in
    • $1: 26.5 mm , 1.02 in
  • Canadian dollar:
    • 1¢: 19.05 mm , 0.75 in
    • 5¢: 21.2 mm , 0.83 in
    • 10¢: 18.03 mm , 0.71 in
    • 25¢: 23.88 mm , 0.94 in
    • 50¢: 27.13 mm , 1.07 in
    • $1: 26.5 mm , 1.02 in
    • $2: 28 mm , 1.1 in
  • Pound sterling
    • 1p: 20.32 mm , 0.8 in
    • 2p: 25.91 mm , 1.02 in
    • 5p: 18 mm , 0.71 in
    • 10p: 24.5 mm , 0.96 in
    • 20p: 21.4 mm , 0.84 in
    • 50p: 27.3 mm , 1.07 in
    • £1: 22.5 mm , 0.89 in
    • £2: 28.4 mm , 1.12 in
  • Euro
    • 1c: 16.25 mm , 0.64 in
    • 2c: 18.75 mm , 0.74 in
    • 5c: 21.25 mm , 0.84 in
    • 10c: 19.75 mm , 0.78 in
    • 20c: 22.25 mm , 0.88 in
    • 50c: 24.25 mm , 0.95 in
    • €1: 23.25 mm , 0.92 in
    • €2: 25.75 mm , 1.01 in

Licensing

w:en:Creative Commons
attribution
This file is licensed under the Creative Commons Attribution 2.0 Generic license.
You are free:
  • to share – to copy, distribute and transmit the work
  • to remix – to adapt the work
Under the following conditions:
  • attribution – You must attribute the work in the manner specified by the author or licensor (but not in any way that suggests that they endorse you or your use of the work).

Checked copyright icon.svg This image, originally posted to Flickr, was reviewed on February 27, 2008 by the administrator or reviewer File Upload Bot (Magnus Manske), who confirmed that it was available on Flickr under the above license on that date.


Licensing:
Creative Commons Attribution 2.0 Generic

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EXIF data:
File name koolu_old.jpg
Size, bytes 877555
Mime type image/jpeg
Image input equipment manufacturer Canon
Image input equipment model Canon DIGITAL IXUS 800 IS
Orientation of image 1
Image resolution in width direction 180/1
Image resolution in height direction 180/1
Unit of X and Y resolution 2
Exposure time 1/25
F number 28/10
Compressed bits per pixel 5/1
Exif version 0220
Lens focal length 5800/1000
Date and time original image was generated 2007:08:26 10:06:48
Date and time image was made digital data 2007:08:26 10:06:48
Meaning of each component 
Shutter speed 149/32
Aperture 95/32
Exposure bias 0/3
Maximum lens aperture 95/32
Metering mode 5
User comments
Supported Flashpix version 0100
Color space information 1
Exif image width 1600
Exif image length 1200
InteroperabilityOffset 2824
Focal plane X resolution 1600000/225
Focal plane Y resolution 1200000/169
Focal plane resolution unit 2
Sensing method 2
Digital zoom ratio 2816/2816
Interoperability index R98
Interoperability version 0100
Type of image IMG:DIGITAL IXUS 800 IS JPEG
Firmware version Firmware Version 1.00
Image number 1015622
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