Timeline for Why is the area in focus in front of the focus distance narrower than behind it?
Current License: CC BY-SA 3.0
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| Feb 27, 2017 at 18:10 | comment | added | Brandon Dube | @MichaelClark "if you move 1 meter forward at 2 meters, you may change an angle by 30 degrees." It is most assuredly not 30 seconds of arc. My comment makes a point about the geometry of relative distances, and then connects that to depth of field, as DoF is this essential geometry on a small scale. The angles relevant to DoF itself are more on the scale of micro-radians in most cases. | |
| Feb 27, 2017 at 12:12 | comment | added | Michael C | Accepted that DoF is about angles in terms of the minute angles at which blur is perceived as a point. But 30°? Do you mean 30 arc seconds? | |
| Feb 26, 2017 at 17:09 | history | answered | Brandon Dube | CC BY-SA 3.0 |