Hi Tony
Here is a nice, simple 3 liner:
- F-ratio determines speed at which a nice non-grainy image can be formed.
- Focal length determines field of view (for a given chip size).
- Aperture determines Rayleigh resolution, although in practice resolution is usually limited by seeing.
This is a direct copy/paste from the informative article at:
http://www.princeton.edu/~rvdb/image...tureFacts.html
By Robert J. Vanderbei at Princeton University.
Cheers
Dennis