Never really gave it much thought but just off the top of my head I'd say MY eye has about a 80-90 degree field of view ... I don't know what that would equate to in focal length.
Our eye aperture varies greatly ... We can open up to probably 1.0 and stop down to 1/32 or more and since our eyes work like a camcorder and we are not freezing motion we see much better than a camera can. As to 50mm ... our eyes are definitely wider than that. This number has probably been heard due to the fact that 50mm seems to be the WAY our eyes see. That is, if our eyes see like a 20mm that's a wide periphery. But, obviously, our eyes don't have any fish-eye look to them. 50mm seems to be the natural look that keeps horizonal and vertical lines from barreling and pincushioning. And our eyes' ISO rating ... it's very sensitive ... and NO noise. Again, the one thing you need to consider is our eyes work like a camcorder. Camcorders don't need a really fast shutter speed in order to properly work because we are capturing motion and not trying to freeze motion like we are with a camera. A camcorder can work well in dim light with a 1/30 shutter speed while in dim light our cameras will struggle to catch an acceptable image at 1/30. Mike -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Singh, Sarbjit (S.) Subject: EOS Human Eye Equivalent 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 Which ones of the above are true ? Regards, Sarbjit Singh * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
