Saturday, April 12, 2008

Quiz #3

This one comes courtesy of Matt Stuart:

What is the f-stop range of the typical human pupil?

First correct answer wins a print.


Bloke With A Camera said...

About f2 - f11?

Ben said...

f8 to f2?

Giorgio said...

from f1 to f8

J. Karanka said...

I wish I remembered! (I met Matt on Tuesday, but had a few) Something around f2.8-f8?

Bloke With A Camera said...
This comment has been removed by the author.
Bloke With A Camera said...

More accurately f2.125 to f11.333.

Focal length of human eye = 17mm
Diameter of min. pupil aperture = 1.5mm
Diameter of max. pupil aperture = 8mm


Mel Trittin said...

f8.3 - f2.1 all other circumstances (medications, damage, etc.) being equal.

Blake Andrews said...

These are all good guesses, and probably within the natural variation of eye/pupil sizes across the population. However, I'm going to go with Mel Trittin's answer based on this Wikipedia entry:
Mel, send me your address and I'll get a print out to you.