Original file (SVG file, nominally 643 × 341 pixels, file size: 4 KB)
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| 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 VargkloatEnglish Wikipedia. |
| 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. |
Transferred from en.wikipedia to Commons by Rezonansowy using CommonsHelper.
| 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 |
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 file.
| Width | 643.054px |
|---|---|
| Height | 340.583px |
