If camera technology is based on human eye then how come normally cameras have a very low depth of field?

Answer 1

Our vision is based on two eyes (stereo-scopic vision) this is what give us our depth perception. Most cameras have only one lens(eye).

Answer 2

What we see with our eyes is in 3-D. What we see on a photo is 2-D. In a 2-D view, the depth is lost because there isn't enough information for us to "know" the distance.

In stereo vision, the pictures acquired by our left and right eyes are slightly different. Our brain is able to use these differences to provide us with the sense of depth. The greater the differences the near the object is to us.

Answer 3

our eyes have a low depth of field too... only you ajust the focus without thinking about it most of the time... and your brain is still more powerfull than a stupid electronic chip, so you can make better use of what you see than machines.

for your information, cameras have a better resolution than you eyes. Plus then get a high resolution everywhere in the "vision" field, not just in the middle...