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Thread: The human Eye.

  1. #1
    Member HHenrYY's Avatar
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    Default The human Eye.

    Hey guys,
    i think this question was asked many times already. (maybe*)

    i did a search for human's eye f-stop and the focal length ...?

    cannot get a definite answer.
    so was wonder what you guys have to say..

    Whats the aperature and focal length of the human eye?

  2. #2

    Default Re: The human Eye.

    donno how u find ur info...but this is wat i got lar.

    http://www.clarkvision.com/imagedeta...esolution.html
    Last edited by shiruikage; 3rd May 2009 at 06:59 PM.
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  3. #3

    Default Re: The human Eye.

    Quote Originally Posted by HHenrYY View Post

    Whats the aperature and focal length of the human eye?
    if you CONCENTRATE, it is been said to be roughly around 50mm

    if not, peripheral vision, it's hard to say, it depends on your state of mind, probably

    as for aperture, it is variable, obviously.

  4. #4
    Member HHenrYY's Avatar
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    Default Re: The human Eye.

    Quote Originally Posted by shiruikage View Post
    donno how u find ur info...but this is wat i got lar.

    http://www.clarkvision.com/imagedeta...esolution.html

    yepp, i've been to this website lerh.

    hmmm.

    seems that focal length and aperture are both variable.

    cause some place gave a value and some range,
    so confused . xD

  5. #5

    Default Re: The human Eye.

    Quote Originally Posted by HHenrYY View Post
    yepp, i've been to this website lerh.

    hmmm.

    seems that focal length and aperture are both variable.

    cause some place gave a value and some range,
    so confused . xD
    best to trust a source with academic backings lor then.
    おれのflickrださ

  6. #6
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    Default Re: The human Eye.

    Quote Originally Posted by HHenrYY View Post
    yepp, i've been to this website lerh.

    hmmm.

    seems that focal length and aperture are both variable.

    cause some place gave a value and some range,
    so confused . xD
    Focal length is not really variable. Don't tell me you can zoom in with your eyes...

  7. #7

    Default Re: The human Eye.

    Quote Originally Posted by calebk View Post
    Focal length is not really variable. Don't tell me you can zoom in with your eyes...
    Maybe he meant the changing of degrees (near/far-sightedness) when we age.

  8. #8

    Default Re: The human Eye.

    Quote Originally Posted by calebk View Post
    Focal length is not really variable. Don't tell me you can zoom in with your eyes...
    nope, but when you concentrate on certain spot, you get tunnel vision

    how the human mind works is so different from a camera, i really don't see a basis for comparison for focal length

    what merit would there be in exploring it?

  9. #9
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    Default Re: The human Eye.

    Quote Originally Posted by night86mare View Post
    nope, but when you concentrate on certain spot, you get tunnel vision

    how the human mind works is so different from a camera, i really don't see a basis for comparison for focal length

    what merit would there be in exploring it?
    I would agree.

    The common thing would be to be really short sighted and see the world without specs. Whoa, creamy bokeh
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  10. #10
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    Default Re: The human Eye.

    Quote Originally Posted by Headshotzx View Post
    I would agree.

    The common thing would be to be really short sighted and see the world without specs. Whoa, creamy bokeh
    creamy? The human eye gives lousy bokeh!

    I'm going to upgrade my eyes soon

  11. #11

    Default Re: The human Eye.

    Interested on this also..hee

  12. #12

    Default Re: The human Eye.

    I feel it's 50mm. But we are able to see more degrees as compared to seeing it through a camera. Not sure about f/stops though. If you have perfect vision, what do you think the f/stop would be?

  13. #13

    Default Re: The human Eye.

    Yeah!! I think focal length is close to 50mm, or 35mm on a crop body.

    Hhhmm, f/stop?? Maybe below 1, f/0.8? You still can see in the dark (a little bit after adjusting).

    After turning off the lights in our rooms before sleeping, plus ambient light. Kinda hard to "register" a shot. Imagine, if I reach for my 40D and squeeze off a few frames, my wife would ask me, "Eh!! WTH, are you doing ahhh?"

    I reckon the shots would come out darker than what my eyes can "see".
    Canon 40D|EFS 17-55mm f/2.8 IS|70-200mm L f/4 IS|50&85mm f/1.8|EFS 10-22 f/3.5-4.5|580 EXII

  14. #14
    Senior Member giantcanopy's Avatar
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    Default Re: The human Eye.

    Quote Originally Posted by calebk View Post
    Focal length is not really variable. Don't tell me you can zoom in with your eyes...
    The focal length of the human eye can be adjusted by changing physical radius of the curvature of the lens during accommodation by pull of ciliary muscles no ?

    Threw my physiology out of the brain, but I think the human eye inspired lots of single element variable focal lens designs

    Ryan

  15. #15

    Default Re: The human Eye.

    ok. Some figures here from the photomag Popular Photography.

    Would be a stretch to say they are medically accurate, more for fun and interest sake.

    Nighttime ISO: 800
    Daytime ISO: 1

    DOF: with focal length of 22mm and field of vision at an extreme of 180 degrees, our eyes are capable of of f/3.5.

    Resolution: At 120 degree field of view, resolution is about 576MB.

  16. #16
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    Default Re: The human Eye.

    I've been wondering about the DR of the human eye for a while as well. From this website it says that the eye's dynamic range is about 1,000,000:1, which i did the math and it worked out to be nearly 20 stops, or doublings. Cool!

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