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 was always taught that is was somewhere near 50mm, more like 52mm. But 50mm lens length is easier, and less costly than 52mm.
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
I seem to remember a Minolta 52mm lens for a while when the SRT series was current.
Bob
* **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
