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Thread: Why is aperture backwards??

  1. #11
    Maris Rusis's Avatar
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    Re: Why is aperture backwards??

    The first time focal ratios were explained to me they were called F.Stops. The bigger the number the more light stopping power the aperture setting had.
    Photography:first utterance. Sir John Herschel, 14 March 1839 at the Royal Society. "...Photography or the application of the Chemical rays of light to the purpose of pictorial representation,..".

  2. #12

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    Re: Why is aperture backwards??

    For a 5.6 lens, Largest Aperture = focal_length/5.6. Hence f/5.6 is the common notation derived from maths

  3. #13
    Drew Wiley
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    Re: Why is aperture backwards??

    Aperture backwards? Wouldn't that be, "erurtrepa" ?

  4. #14
    Alan Klein's Avatar
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    Re: Why is aperture backwards??

    Substitute a 1 for the f and it will all make sense.
    f/1.4 1/1.4

    f/2 1/2

    f/4 1/4

    f/5.6 1/5.6

    f/8 1/8

    f/11 1/11

    f/16 1/16


    etc.

  5. #15
    Vaughn's Avatar
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    Re: Why is aperture backwards??

    What strange gods of optics declared that the the closer the camera is to an object, the further the lens has to be from the film for the object to be in focus?!!!!!
    "Landscapes exist in the material world yet soar in the realms of the spirit..." Tsung Ping, 5th Century China

  6. #16

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    Why is aperture backwards??

    Quote Originally Posted by Vaughn View Post
    What strange gods of optics declared that the the closer the camera is to an object, the further the lens has to be from the film for the object to be in focus?!!!!!
    This is a very interesting observation. If it were the opposite, then landscape photography wouldn’t be possible as the further away the camera is from the object, the further the lens would have to be from the film (in this opposite logic situation). So focusing to infinity would be difficult. So it has to be the other way. Otherwise we wouldn’t have working eyes. I guess you could say life could exist without vision. But not this forum. Ergo, since this forum exists..... :-)

  7. #17
    Drew Bedo's Avatar
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    Re: Why is aperture backwards??

    Strange inverse natural laws indeed . . .

    Youth is wasted on the young!
    No good deed goes unpunished.
    Virtue is its own revenge.
    Drew Bedo
    www.quietlightphoto.com
    http://www.artsyhome.com/author/drew-bedo




    There are only three types of mounting flanges; too big, too small and wrong thread!

  8. #18
    ic-racer's Avatar
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    Re: Why is aperture backwards??

    Don't feel bad, ISO is backwards, a higher number when less exposure is needed; wire gauge is backwards, a larger number is smaller wire, Shore value is backwards, a larger number is less compliant; color temperature is backwards, a hotter temperature is COOLER light; sandpaper is backwards, a higher number is smaller grit; springs are backwards, cut in half and it is twice as strong; A 10.5T electric motor is more powerful than a 25.5T motor; in vehicle dynamics a higher roll center produces less roll; and many others....

  9. #19
    Alan Klein's Avatar
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    Re: Why is aperture backwards??

    Quote Originally Posted by ic-racer View Post
    Don't feel bad, ISO is backwards, a higher number when less exposure is needed; wire gauge is backwards, a larger number is smaller wire, Shore value is backwards, a larger number is less compliant; color temperature is backwards, a hotter temperature is COOLER light; sandpaper is backwards, a higher number is smaller grit; springs are backwards, cut in half and it is twice as strong; A 10.5T electric motor is more powerful than a 25.5T motor; in vehicle dynamics a higher roll center produces less roll; and many others....
    Too bad age isn't like that.

  10. #20
    Tin Can's Avatar
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    Re: Why is aperture backwards??

    Live your life backwards?

    What happens when we move the studio light farther away?
    2022

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