For example, if I have a lens that is 16mm-50mm, which focal length would be the closest to the human eye's view? (I don't have a camera yet, so I'm just curious.)
Would 50mm be more zoomed in than "normal"?
I imagine 16mm would be wider than the normal human point of view?
Answer
That depends on the sensor size of the camera.
"A lens is considered to be a "normal lens", in terms of its angle of view on a camera, when its focal length is approximately equal to the diagonal dimension of the film format or image sensor format.[4] The resulting diagonal angle of view of about 53 degrees is often said to approximate the angle of human vision"
http://en.wikipedia.org/wiki/Lenses_for_SLR_and_DSLR_cameras
So, for a full frame sensor (24mm x 36mm), about 45mm would be normal view. For an APS-C size sensor (15mm x 23mm), about 30mm would be normal view.
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