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<blockquote data-quote="FastGlass" data-source="post: 223047" data-attributes="member: 13822"><p>If shooting in TTL. The meter in camera has nothing to do with flash. Only ambient light. So if setting the cameras meter for proper exposure for ambient light and then turning on flash. The flash most likely will not contribute much to the exposure. Well it will add a little fill but thats about it. The flash will fire preflash which you can't really see happening and it will adjust according. If you're scene has good lighting than the output on the flash will be dramaticly reduced because it feels it doesn't need it. But at the same time while stopping down the ambient to underexpose the background. You're in camera meter will try and tell you you're underexposed which is o'k but you're flash will fire and light up what ever you're metering and focusing on. When in TTL mode the camera is metering the light output from the flash through the lense until it sees a good exposure and then shuts down the flash. For the most part it works pretty good. Alot of times I need to tell the flash to give or subtract a little power.</p></blockquote><p></p>

[QUOTE="FastGlass, post: 223047, member: 13822"] If shooting in TTL. The meter in camera has nothing to do with flash. Only ambient light. So if setting the cameras meter for proper exposure for ambient light and then turning on flash. The flash most likely will not contribute much to the exposure. Well it will add a little fill but thats about it. The flash will fire preflash which you can't really see happening and it will adjust according. If you're scene has good lighting than the output on the flash will be dramaticly reduced because it feels it doesn't need it. But at the same time while stopping down the ambient to underexpose the background. You're in camera meter will try and tell you you're underexposed which is o'k but you're flash will fire and light up what ever you're metering and focusing on. When in TTL mode the camera is metering the light output from the flash through the lense until it sees a good exposure and then shuts down the flash. For the most part it works pretty good. Alot of times I need to tell the flash to give or subtract a little power. [/QUOTE]

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