Image:Piper longum.jpg

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I took this photo at 2006-06-10

GNU head Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled " GNU Free Documentation License".

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U.S. quarter
A tape measure
This image has a coin in it to indicate scale.

Do not rely solely on coins or other "common" objects for scale, as it will require people unfamiliar with it to look up its dimensions or guess, both of which defeat the purpose of the coin in the first place.

Please photograph an object such as a ruler or add a scale marking in via an image editor instead. Standard units such as SI/metric units should be used (See metre, 1 E-2 m).

Examples of good practice: with superimposed line.
Examples of bad practice: here.

Common coin diameters for reference:

  • U.S. and Canada:
    • 1¢: 19 mm, 0.75 in;
    • 5¢: 20 mm, 0.79 in;
    • 10¢: 18 mm, 0.71 in;
    • 25¢: 24 mm, 0.95 in;
    • 50¢: 30 mm, 1.18 in;
    • $1: 26 mm, 1.02 in;
    • $2: 28 mm, 1.10 in.
  • UK
    • 1p: 20.32 mm, 0.80 in;
    • 2p: 25.91 mm, 1.02 in;
    • 5p: 18.00 mm, 0.71 in;
    • 10p: 24.50 mm, 0.96 in;
    • 20p: 21.40 mm, 0.84 in;
    • 50p: 27.30 mm, 1.07 in;
    • £1: 22.50 mm, 0.89 in;
    • £2: 28.40 mm, 1.12 in.
  • Eur
    • 1¢: 16.25 mm,
    • 2¢: 18.75 mm,
    • 5¢: 21.25 mm,
    • 10¢: 19.75 mm,
    • 20¢: 22.25 mm,
    • 50¢: 24.25 mm,
    • 1€: 23.25 mm,
    • 2€: 25.75 mm,

The following pages on the English Wikipedia link to this file (pages on other projects are not listed):

Metadata

This file contains additional information, probably added from the digital camera or scanner used to create or digitize it. If the file has been modified from its original state, some details may not fully reflect the modified image.

Camera manufacturer Canon
Camera model Canon DIGITAL IXUS 30
Orientation Normal
Horizontal resolution 180 dpi
Vertical resolution 180 dpi
File change date and time 11:41, 10 June 2005
Y and C positioning 1
Exposure time 1/30 sec (0.0333333333333)
F-number f/2.8
Exif version 2.2
Date and time of data generation 11:41, 10 June 2005
Date and time of digitizing 11:41, 10 June 2005
Image compression mode 5
Shutter speed 4.90625
Aperture 2.96875
Exposure bias 0
Maximum land aperture 2.96875
Metering mode CenterWeightedAverage
Flash 16
Lens focal length 5.8 mm
Colour space sRGB
Focal plane X resolution 9142.85714286
Focal plane Y resolution 9142.85714286
Focal plane resolution unit inches
Sensing method One-chip colour area sensor
Custom image processing Normal process
Exposure mode Auto exposure
White Balance Manual white balance
Digital zoom ratio 1
Scene capture type Standard
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