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Thread: the human eye

  1. #1

    Default the human eye

    the human eye can be compared to the lens of a cam....if so..
    what would be the "specs" for the eye ?

    f/? to f/?
    cont. AF ?
    matrix metering?

  2. #2

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    Quote Originally Posted by acetylcholine
    the human eye can be compared to the lens of a cam....if so..
    what would be the "specs" for the eye ?

    f/? to f/?
    cont. AF ?
    matrix metering?
    f/1 ;P..... mainly spot metering with ultra fast Auto Focus.

  3. #3

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    Quote Originally Posted by blurblock
    f/1 ;P..... mainly spot metering with ultra fast Auto Focus.
    spot meter ?
    erm
    if someone is standing in front of a bright background i cant see a thing man
    a sill at best..
    i think center meter at best ??

    as for AF, god-speed. USM ? pui ( no insult to canon users) more keng than USM :P

    but how do u explain some ppl short sighted,long sighted, etc?

    'lens' quality no good ? ahahhaha

  4. #4
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    Default

    short sighted? they canx see furthur.. = Prime lens?
    LOL

  5. #5
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    Default

    Quote Originally Posted by acetylcholine
    spot meter ?
    erm
    if someone is standing in front of a bright background i cant see a thing man
    a sill at best..
    i think center meter at best ??

    as for AF, god-speed. USM ? pui ( no insult to canon users) more keng than USM :P

    but how do u explain some ppl short sighted,long sighted, etc?

    'lens' quality no good ? ahahhaha


    That because someone forgot the extension tube inside the eyes.

    thats for short sighted


    They only got have a pair of teles for cannot focus on near object.

    Long sighted
    Last edited by Aton; 29th April 2004 at 04:34 PM.

  6. #6

    Default

    Quote Originally Posted by acetylcholine
    the human eye can be compared to the lens of a cam....if so..
    what would be the "specs" for the eye ?

    f/? to f/?
    cont. AF ?
    matrix metering?

    i would say the world's best lens u ever get

    just one lens to let u see near, nearer or nearest and far, further or furthest

  7. #7

    Default

    specifications for the eye:

    focal length: 50mm
    aperture: f1 to f8
    close focussing distance: 150mm
    instantaneous continuous autofocus
    automatic exposure compensation
    resolving power: 8lp/mm
    no chromatic aberrations
    no distortion
    automatic tilt-shift for perspective control
    uniform centre to edge sharpness
    built-in image stabiliser and lens cleaner
    matrix metering
    can meter in low light conditions down to EV 2
    size: 25mm diameter
    weight: 40g
    price: free
    you can buy better gear but you can't buy a better eye

  8. #8

    Default

    Quote Originally Posted by zaren
    specifications for the eye:

    focal length: 50mm
    aperture: f1 to f8
    close focussing distance: 150mm
    instantaneous continuous autofocus
    automatic exposure compensation
    resolving power: 8lp/mm
    no chromatic aberrations
    no distortion
    automatic tilt-shift for perspective control
    uniform centre to edge sharpness
    built-in image stabiliser and lens cleaner
    matrix metering
    can meter in low light conditions down to EV 2
    size: 25mm diameter
    weight: 40g
    price: free
    Comes with "Never Lost" lens cap and fully adjustable lens hood H(ands)Ds-02

  9. #9

    Default

    Also no flare problem

    always in shuttle priority mode (bulb)???
    with pupil of eye (apperture) changing size frequently to fit the ambience light.. in dark room, pupil become big, in bright light pupil become small...

    it does not come with macro capability... need to use microsope or manifying glass add on...

    can use all brand of telescope / bino for tele-zoom

    price? priceless...

  10. #10

    Default

    oh yah did anyone mention, auto-servicing?
    can nikon/canon do it ? :P

  11. #11
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    The eye is also a 'film'/'sensor'. Possibly ISO 50 to 12800+++. We see at about 1/50 shutter speed (That's our PAL TV refresh rate) and we have no problem seeing in moon lit lanscape. Our cameras on highest ISO film at largest aperture probably needs a few seconds of exposure to get what our eyes sees. But we are not infra and ultra sensitive, unlike some film and some sensor.

  12. #12
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    Default

    Oh yeah, as a lens, our eye often gets ND filters attached on bright days.

  13. #13
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    Default

    I beleive that the eye is not spot, centre, average or matrix metering. It can actually meter differently and expose differently for different locations on the sensor! Image auto ISO on each pixel, and yet still coming with sensible images!

  14. #14

    Default

    Quote Originally Posted by zaren
    specifications for the eye:

    focal length: 50mm
    aperture: f1 to f8
    close focussing distance: 150mm
    instantaneous continuous autofocus
    automatic exposure compensation
    resolving power: 8lp/mm
    no chromatic aberrations
    no distortion
    automatic tilt-shift for perspective control
    uniform centre to edge sharpness
    built-in image stabiliser and lens cleaner
    matrix metering
    can meter in low light conditions down to EV 2
    size: 25mm diameter
    weight: 40g
    price: free

    Jia Wang... "A photo is only as beautiful as the photographer's eyes can see."
    My Eyes ;)

  15. #15

    Default

    Hmmm... thinking about the eye as a lens, then some of the stuff we've mentioned (e.g. metering, shutter speed) actually falls under the camera body's functions... which would be equivalent to our brains!

  16. #16

    Default

    ok...
    compiling the specs

    Eye

    Aperture: anywhere from f/1 to f16
    Cont AF
    Matrix or centre metering
    ISO: 50 to 12800
    Range: 50mm to infinity
    Resolving power: 4 micrometers
    automatic exposure compensation
    size: 25mm diameter
    weight: 40g
    price: free

    no chromatic aberrations
    no distortion
    automatic tilt-shift for perspective control
    uniform centre to edge sharpness
    built-in image stabiliser, lens cleaner and lens hood.
    auto repair systems
    twin lenses for 3D imaging

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