How could I compare what a normal eye can see to a camera lens? I just went through a very comprehensive article @ CambridgeInColor, but I'm still not really clear.

When I take a picture with a SLR camera from an object about 30m from me: what focal length do I need to use, how should I present this picture to truly capture what the eye can see (because of the 40-60° that we see 100% everything)? And how should I print it to scale? Are there any options so I can put a ruler, or a human being at a certain point to be able to show the differences?

I hope I'm clear here, but if not, please comment and I'll try to explain better! What I'm aiming for is that I need a picture, but not a picture in itself, but more like what the eye will see at that position. Not what the camera registers.


  • $\begingroup$ There are many questions similar to this posted on the SE Biology page (biology.stackexchange.com/search?q=camera+eye). $\endgroup$ – Bez Nov 22 '14 at 12:12
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    $\begingroup$ @Bez I of course did a search first before posting. But the only 2 closest related articles were something about sighted Ness and my question. So I believe the question is relevant. Please correct me if not. $\endgroup$ – Steven Van Ingelgem Nov 22 '14 at 16:55
  • $\begingroup$ What exactly do you wish to achieve here? I mean, what is the practical purpose of this question? As of now the question is kind of vague and a purpose-driven approach may yield more answers to this interesting question. $\endgroup$ – AliceD Dec 12 '14 at 12:36

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