One Confusing Thing

[Buszaj]

Hi everyone,
I've been wondering about the measurement's in mm's on lenses and human sight. I've been reading a few things and wanted to clarify; is the "regular" human sight "50mm?" If so, if a lens is for example 100mm, does it "see" twice as far or deeper? A bit confusing for me; any clarification would be awesome!

Thank You:hail:

 

[WDodd]

50mm on a 35mm is about the same angle of of view that the human eye sees.

If you look at an object through a 50mm lens and a 100mm lens it will be twice as magnified through the 100mm lens. Of course the overall scene will have quite a bit less angle of view (50mm has an AOV of about 47 degrees and I'm not sure what 100mm is).

The measure of the lens is really only a representation of the distance from the film plane/digital sensor to the optical center/nodal point of the lens. It doesn't have anything to do with human sight.