Timeline for Is there something special about f/3.5-5.6?
Current License: CC BY-SA 3.0
2 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Sep 27, 2013 at 7:15 | comment | added | Michael C | As a zoom lens is extended, the relationship of the front elements/groups increases the magnification between the front of the lens and the diaphragm, which causes the entrance pupil (or effective aperture) to increase for the same size diaphragm opening. Otherwise the same 5.14mm opening required for f/3.5 at 18mm would yield an f-number of 10.7 at 55mm focal length. | |
| Sep 26, 2013 at 19:57 | history | answered | AJ Henderson♦ | CC BY-SA 3.0 |