File:Focal ratio.svg
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Original file (SVG file, nominally 643 × 341 pixels, file size: 4 KB)
Summary
| Description |
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 Wikipedia. |
Licensing
|
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.
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 23:13, 25 November 2013 | | 643 × 341 (4 KB) | wikimediacommons>File Upload Bot (Magnus Manske) | Transfered from en.wikipedia by User:Rezonansowy using CommonsHelper |
File usage
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