Your peripheral vision extends out almost 170� so in one way your eye is almost fisheye like, but the brain can vary the angle that it pays attention to dynamically giving you a zoom-like effect (the size of objects don't actually become bigger, but you frame them differently).
Regarding the retina's sensitivity to light, you are definitely right, but it also will capture a wider range of tones than any film, both highlight and shadow! This is partially due to the dynamically changing iris that will open up as you concentrate on a shadow area.
It is very hard to separate the simple camera that is the eye, from the brain's image processing.
Good luck,
Mr. Bill
Singh, Sarbjit (S.) wrote:
Does any one know what the human eye equivalent is in lenses (using the 35mm film as basis of comparison).
I have heard different numbers i.e.
1) The effective focal length of human eye is between 13-16mm, and the effective numerical aperture is about f3 to f4.
2.) The effective focal length of human eye is 50mm
3.) The effective focal length of human eye is 105mm
4.) The retina ASA, it far exceeds any existing high speed films
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