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05/10/2008 03:39:37 PM · #1 |
Could be an uninteresting question but I keep wondering:
What is the correct focusing distance actually if we want to capture a reflection?
Is it the distance between the camera and the reflecting object? Or between the camera and the reflected item?
Is it the same answer if the reflecting object is a mirror VS a drop?
Any help would be appreciated!
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05/10/2008 09:20:48 PM · #2 |
| If a flat mirror, the correct distance is the distance from the camera to the object. If a non-flat mirror or surface, it's more complicated. In the case of a very convex surface, like that of a drop of liquid, the focal length of the drop is so short that almost anything behind it will be in focus when viewing through it (refraction) and almost anything reflected in it will be in focus. This is true for the same reason that very short focal lenses have large DoF; it's an extreme case of the same phenomenon. |
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