please explain fec and fel , canon 10d

Discussion in 'Digital Photography' started by Ole uncle ted, Feb 17, 2004.

  1. ive read others use the terms fec (flash exposure compensation ? )
    and fel(flash exposure lock ?)

    im using the canon 10d and a sigma super 550 flash .

    im not exactly sure what these terms mean and why ,how & when to apply ,if you
    guys could enlighten me that would be great.

    thanks.
    teddy
     
    Ole uncle ted, Feb 17, 2004
    #1
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  2. Ole uncle ted

    YoYo Guest

    Flash Exposure Compensation is basically move it to the - side and it
    weakens the flash, move it to the + side and the flash is stronger

    FE Lock is to lock flash on a particular part of photo
    ex. locking the flash reading on the persons face.

    Not positive about the Sigma super 550 flash never used one.
     
    YoYo, Feb 17, 2004
    #2
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  3. Ole uncle ted

    Chris Brown Guest

    The E-TTL flash system used on teh 10D works by firing a preflash, sensing
    how much light is returned and then working out how much it needs to fire
    the flash tgo make the subject (thing under the selected focus point) equal
    in illumination to mid-grey.

    Flash exposure lock allows you to fire this preflash at any point yourself,
    prior to pressing the shutter release, so that can fire the preflash at
    something which is neutral, or mid-grey in your picture, recompose and then
    shoot, and it will illuminate accordingly.

    Flash exposure compensation does the same thing as ordinary exposure
    compensation, but for the flash illumination. Set it to +2 and it will try
    to make the subject almost white. Set it to -2 and it will leave it almost
    black. 0 gives neutral/mid grey.
     
    Chris Brown, Feb 17, 2004
    #3
  4. Ole uncle ted

    Andy B Guest

    Andy B, Feb 17, 2004
    #4
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