Metering for Flash

Discussion in 'Photography Beginners' Forum' started by smackitsakic, Jun 16, 2010.

  1. smackitsakic

    smackitsakic TPF Noob!

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    I try to avoid using my flash if at all possible but, now with having a macro lens, i'm finding myself wanting to use flash more.

    Simple question here, how the heck do I meter in manual mode when using flash? I think the 'standard' flash metering is f5.6 at 1/60 shutter speed. Do I simply do the appropriate math as needed to re-meter for slower faster shutter speeds (ie: f8.0 at 1/30 shutter speed or, on the other side, f4.0 at 1/125 shutter speed)?

    Any basic information would be great! Thanks.
     
  2. Josh66

    Josh66 Been spending a lot of time on here!

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    I assume you're talking about the pop-up flash?

    Pretty sure E-TTL is your only option, I don't think the camera will even allow you to adjust the flash power...

    Just set the shutter speed to the max sync speed (probably 1/200 or 1/250 ... check your manual), and put the aperture wherever you need it for the DOF you want.

    The camera will fire a preflash, meter the light bouncing back, adjust the power if necessary, then open/close the shutter while firing the 'real' flash. This will happen so fast, it will look like the flash only went off once.

    Basically, none of the settings matter - put them wherever you want. The camera will automatically try to make it a 'good' exposure.
     
  3. pbelarge

    pbelarge TPF Noob!

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    I used the 580 today and I was able to set the flash power. My first time using a flash, what an experience...:confused:
     
  4. Josh66

    Josh66 Been spending a lot of time on here!

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    Yup, whole new learning curve, lol. (At least you got the right one. :) :thumbup:)

    For the pop-up flash though - other than Flash Exposure Compensation (FEC), I don't think there's really anything at all you can do to change the settings...

    I mean, It's not like you can dial it in to 1/4 power or anything like that.


    Still not really sure what kind of flash we're talking about here, but I just assumed it was the pop-up flash...

    "I try to avoid using my flash if at all possible" ... Why would you buy a flash that you didn't intend to use? (That's why I assumed pop-up unit)
     
    Last edited: Jun 16, 2010
  5. smackitsakic

    smackitsakic TPF Noob!

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    Yes, talking about pop-up flash! I don't have any external flash devices.
     
  6. Fedaykin

    Fedaykin TPF Noob!

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    Your only option with the pop up flash is Flash Exposure Compensation as it only fires on ETTL. If you're really interested in macro you should really consider a hot shoe flash, or even a ring flash.

    Learning to use a flash is a whole other venture, read this: strobist.com
     
  7. smackitsakic

    smackitsakic TPF Noob!

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    Thanks for the tips. I'll have to do some reading on ETTL and Flash Exposure Compensation! I have no idea what either of them are.
     

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