Size of this PNG preview of this SVG file: 643 × 341 pixels. Other resolutions: 320 × 170 pixels | 640 × 339 pixels | 1,024 × 543 pixels | 1,280 × 679 pixels | 2,560 × 1,358 pixels.
Original file (SVG file, nominally 643 × 341 pixels, file size: 4 KB)
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Summary
| DescriptionFocal ratio.svg |
English: Diagram of the——focal ratio of a simple optical system where is the focal length and is the diameter of the objective. |
| Date | 27 August 2007 (original upload date) |
| Source | Own work by, the original uploader |
| Author | The original uploader was Vargklo at English XIV. |
Licensing
| Public domainPublic domainfalsefalse |
|
This work is ineligible for copyright and therefore in the public domain because it consists entirely of information that is common property and contains no original authorship. |
Original upload log
Transferred from en.wikipedia——to Commons by Rezonansowy using CommonsHelper.
The original description page was here. All following user names refer——to en.wikipedia.
- 2007-08-27 21:22 Vargklo 643×341× (4462 bytes) SVG of Image:Focal ratio.png.
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27 August 2007
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 21:13, 25 November 2013 | | 643 × 341 (4 KB) | File Upload Bot (Magnus Manske) | Transfered from en.wikipedia by User:Rezonansowy using CommonsHelper |
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| Width | 643.054px |
|---|---|
| Height | 340.583px |