Question regarding using flash with diffusers


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torak

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Sep 4, 2009
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#1
I notice that when using a diffuser, the pictures taken is under exposed. Im guessing this is due to the camera incorrectly judging the amount of light available, as they cant calculate the amount of light loss due to the use of diffusers.

Just wondering how you guys compensate for this? by adjusting exposure compensation? Or set flash to be stronger?

BTW Im using ADI settings for flash. Should i use pre flash TTL instead?

Thanks.
 

Rashkae

Senior Member
Nov 28, 2005
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#2
TTL is more accurate in this case.
 

catchlights

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Sep 27, 2004
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Punggol, Singapore
www.foto-u.com
#3
using diffuser on flash will cut down the power, check whether are you out of flash working range, if yes, the flash already deliver maximum power and still unable to get correct exposure. add compensation is useless here, flash can't give you any more power.

just go closer to you subject or up your ISO or use wider aperture
 

torak

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Sep 4, 2009
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#4
using diffuser on flash will cut down the power, check whether are you out of flash working range, if yes, the flash already deliver maximum power and still unable to get correct exposure. add compensation is useless here, flash can't give you any more power.

just go closer to you subject or up your ISO or use wider aperture
im still well within range of my flash (standing just 1-2 metre from subject). I noticed that adjusting aperture or ISO or shutter speed etc doesnt help, as the camera compensates it by lowering the power of the flash, thinking that there is too much light (due to camera did not factor in diffuser).

As such Im thinking of using exposure compensation instead, or flash compensation. Just wanted to ask what do u guys do normally.
 

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