Timeline for Do lenses with the same f-stop but different focal length gather the same amount of light?
Current License: CC BY-SA 3.0
3 events
| when toggle format | what | by | license | comment | |
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| Jul 3, 2013 at 23:01 | comment | added | Michael C | Actually, it assumes the focus is set at infinity. A blurry subject wouldn't necessarily reduce the light collected, just spread it out more evenly. | |
| Jul 3, 2013 at 19:42 | comment | added | AJ Henderson♦ | One minor point, that assumes the subject is at infinite distance. Working f-number can come in to effect for things that are close enough. | |
| Jul 3, 2013 at 19:21 | history | answered | Philip Kendall♦ | CC BY-SA 3.0 |