File:Olhos de um gato-3.jpg
From Wikimedia Commons, the free media repository
Jump to navigation
Jump to search
Size of this preview: 630 × 600 pixels. Other resolutions: 252 × 240 pixels | 504 × 480 pixels | 806 × 768 pixels | 1,075 × 1,024 pixels | 1,657 × 1,578 pixels.
Original file (1,657 × 1,578 pixels, file size: 1.9 MB, MIME type: image/jpeg)
File information
Structured data
Captions
DescriptionOlhos de um gato-3.jpg | "Unlike human eyes, which work best in daylight, the cat’s eyes must function well in extremely low light conditions and as such are well suited to an animal that is predominantly nocturnal and crepuscular in activity. In darkness, cats' eyes are able to function in approximately one-sixth of the light needed for human vision. However, they must also be able to function well in daylight – so just how is this achieved? In low light levels the cat's pupil must be able to open as wide as possible, but also be able to contract to very small size to protect the sensitive retina in bright sunlight. In human eyes, this size variation of the pupil is controlled by a circular ciliary muscle, but this limits the amount of size variation. In cats however, the same process is controlled by two, shutterlike ciliary muscles, which gives the cat its characteristic slitlike pupil in bright light conditions. " |
Date | (UTC) |
Source | |
Author |
|
This is a retouched picture, which means that it has been digitally altered from its original version. Modifications: Crop. The original can be viewed here: Olhos de um gato-2.jpg: . Modifications made by TimVickers.
|
I, the copyright holder of this work, hereby publish it under the following licenses:
This file is licensed under the Creative Commons Attribution-Share Alike 2.0 Generic license.
- You are free:
- to share – to copy, distribute and transmit the work
- to remix – to adapt the work
- Under the following conditions:
- attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
- share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.
This file is licensed under the Creative Commons Attribution-Share Alike 2.0 Generic license.
- You are free:
- to share – to copy, distribute and transmit the work
- to remix – to adapt the work
- Under the following conditions:
- attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
- share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.
You may select the license of your choice.
Original upload log[edit]
This image is a derivative work of the following images:
- File:Olhos_de_um_gato-2.jpg licensed with Cc-by-sa-2.0, Cc-by-sa-2.0
- 2009-08-25T22:43:20Z Tm 1789x1604 (2254532 Bytes) {{Information |Description="Unlike human eyes, which work best in day light, the cat’s eyes must function well in extremely low light condition and as such are well suited to an animal that is predominantly nocturnal a
Uploaded with derivativeFX
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 23:00, 26 August 2009 | 1,657 × 1,578 (1.9 MB) | TimVickers (talk | contribs) | {{Information |Description="Unlike human eyes, which work best in day light, the cat’s eyes must function well in extremely low light condition and as such are well suited to an animal that is predominantly nocturnal and crepuscular in activity. In |
You cannot overwrite this file.
File usage on Commons
The following 2 pages use this file:
File usage on other wikis
The following other wikis use this file:
- Usage on af.wikipedia.org
- Usage on en.wikipedia.org
- Usage on es.wikipedia.org
- Usage on hy.wikipedia.org
- Usage on nl.wikipedia.org
Metadata
This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
Camera manufacturer | Canon |
---|---|
Camera model | Canon EOS 5D |
Exposure time | 1/500 sec (0.002) |
F-number | f/1.2 |
ISO speed rating | 100 |
Date and time of data generation | 16:52, 16 September 2007 |
Lens focal length | 50 mm |
Orientation | Normal |
Horizontal resolution | 300 dpi |
Vertical resolution | 300 dpi |
Software used | Adobe Photoshop 7.0 |
File change date and time | 17:59, 26 August 2009 |
Exposure Program | Aperture priority |
Exif version | 2.21 |
Date and time of digitizing | 16:52, 16 September 2007 |
APEX shutter speed | 8.965784 |
APEX aperture | 0.526069 |
APEX exposure bias | 0 |
Metering mode | Pattern |
Flash | Flash did not fire, compulsory flash suppression |
Color space | sRGB |
Focal plane X resolution | 3,086.9259259259 |
Focal plane Y resolution | 3,091.2954545455 |
Focal plane resolution unit | inches |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Scene capture type | Standard |