Exposure Compensation and flash

Discussion in '35mm Cameras' started by Robert Whitehouse, Oct 6, 2003.

  1. Does any body know if exposure compensation is applied to TTL flash

    I suppose that I am looking for a way to get my Pentax SLR to do fill-flash
    and think perhaps the following might work;

    1) Put the camera in manual ("M") mode and set correct exposure for ambient
    2) Pop the flash up and dial in -2 on exposure compensation.

    Will this work ?

    Bob W
    Robert Whitehouse, Oct 6, 2003
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  2. Robert Whitehouse

    Simon Guest

    I don't know the mechanics of Pentax compensation, but on the Minolta
    Dynax 5 which doesn't have individual exposure and flash compensation,
    method suggested by others is as follows...

    (I'm guessing that as you're asking the question, your Pentax doesn't
    have individual flash and exposure compensation either).

    For -2 stops on the flash:

    1. Set manual mode on the camera.

    2. Adjust the ISO rating up by 2 stops (e.g. a 100 speed film -> 400)

    3. Enable the flash.

    4. Set the shutter to flash-sync speed or slower & aperture so that
    the camera meter reads +2 stops over normal (remember the camera
    thinks you've got a faster film than you really have).

    5. Shoot.

    I'd guess this approach should work for any camera with adjustable
    ISO settings, internal metering and manual mode.

    Oh, and finally,

    6. Don't forget to reset the ISO rating when you've finished to
    the proper values.

    For different flash compensation values, adjust the above numbers
    as appropriate.

    Simon, Oct 6, 2003
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  3. Yes give or take. It is not an exact science it is an art so -2 may be
    too much or too little, but it is a good starting point.

    Some camera/flash combinations will do it auto, but I guess yours is not
    one of them.
    Joseph Meehan, Oct 6, 2003
  4. Thanks,

    This all makes sense and should work with just about any camera (that has
    manual ISO and expsoure mode).

    Bob W
    bob whitehouse, Oct 7, 2003
  5. Robert Whitehouse

    JD Guest

    What about a Rebel Ti with a 420 speedlite?

    JD, Oct 8, 2003
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