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Thread: asking flash distance in GN Mode...

  1. #1

    Smile asking flash distance in GN Mode...

    hi...
    i m aware about the GN calculation...for optimum result...

    GN = Aperture x Distance

    and the distance mean 'from camera to subject'
    but...are this apply to the distance from the flash to subject...
    (situation - subject in 12 o'clock)
    (situation - flash in 6 o'clock / 45deg toward subject)
    (situation - flash in 9 o'clock)
    (situation - reflector in 2 o'clock)
    hope this will help..

    thank in advance

  2. #2

    Default Re: asking flash distance in GN Mode...

    Hope the following will help
    http://en.wikipedia.org/wiki/Guide_number

    I am NOT a PROfessional photographer and photography is NOT my hobby

  3. #3
    Senior Member giantcanopy's Avatar
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    Default Re: asking flash distance in GN Mode...

    Quote Originally Posted by encikboyak View Post
    hi...
    i m aware about the GN calculation...for optimum result...

    GN = Aperture x Distance

    and the distance mean 'from camera to subject'
    but...are this apply to the distance from the flash to subject...
    (situation - subject in 12 o'clock)
    (situation - flash in 6 o'clock / 45deg toward subject)
    (situation - flash in 9 o'clock)
    (situation - reflector in 2 o'clock)
    hope this will help..

    thank in advance

    It should be distance from flash to subject
    U can take it as from the camera to subject since the difference issin that great unless u are using it off shoe.

    Since it is a function of the distance of the light from the flash travelling to the subject u need to look at the path taken

    E.g if u r bouncing flash off a wall to the person, the distance will logically be longer compared to a directed flash

    Ryan

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