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Source page: | http://commons.wikimedia.org/wiki/File:Bauxite_sample.jpg |
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Summaryedit
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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. This is particularly true for coins such as the "dime", which non-Americans would first need to look up how many cents this equates to, then look in a table such as that below. 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. |
Common coin diameters for reference:
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Description |
English: Bauxite with one NT dolor .
中文: 鋁礬土樣本與一枚新台幣。
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Date | |
Source | Own work |
Author | GOKLuLe 盧樂 |
Licensingedit
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EXIF data: | |
File name | bauxite_sample.jpg |
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Size, Mbytes | 1.9881201171875 |
Mime type | image/jpeg |
Camera manufacturer | CASIO COMPUTER CO.,LTD. |
Camera model | EX-FH100 |
Orientation of image | 1 |
Image resolution in width direction | 72 |
Image resolution in height direction | 72 |
Unit of X and Y resolution | 2 |
Exposure time | 1/60 sec (0.016666666666667) |
F number | f / 4.6 |
Exposure program | 2 |
ISO speed rating | 400 |
Compressed bits per pixel | 5.1440329218107 |
Exif version | 0221 |
Lens focal length | 13.6 mm |
Date and time original image was generated | 2011:10:10 15:36:53 |
Date and time image was made digital data | 2011:10:10 15:36:53 |
Meaning of each component | |
Exposure bias | 0 |
Maximum lens aperture | 3.4 |
Metering mode | 5 |
Light source | 13 |
Supported Flashpix version | 0100 |
Color space information | 1 |
Exif image width | 2304 |
Exif image length | 1728 |
InteroperabilityOffset | 10218 |
White balance | 1 |
Digital zoom ratio | 0 |
Focal length in 35 mm film | 80 mm |
Sharpness | 2 |
Interoperability index | R98 |
Interoperability version | 0100 |
Software used | 1.00 |
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