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)
 | This is a file from the Wikimedia Commons. Information from its description page there is shown below. Commons is a freely licensed media file repository. You can help. |
Summary
| Description |
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 | 21:13, 25 November 2013 | | 643 × 341 (4 KB) | File Upload Bot (Magnus Manske) | Transfered from en.wikipedia by User:Rezonansowy using CommonsHelper |
File usage
The following pages on the English Wikipedia use this file (pages on other projects are not listed):
Global file usage
The following other wikis use this file:
- Usage on el.wikipedia.org
- Usage on en.wikiversity.org
- Usage on he.wikipedia.org
- Usage on it.wikipedia.org
