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Nikon DSLR Cameras
D750
Does Metering System works with Flash ?
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<blockquote data-quote="Felisek" data-source="post: 433306" data-attributes="member: 23887"><p>Fred, this is not how iTTL works. In iTTL mode the flash sends a low-level flash, with the lens wide open, before the mirror is raised, so the camera's meter can measure the amount of light reflected from the subject. Then, the camera decides how much light is required, sets the flash's power to the the appropriate level and takes the picture.</p><p></p><p>PS. I don't think you can control flash duration. There is a capacitor in the flash unit and when the flash is triggered it is discharged into the flash tube. I don't think you can stop this process, once it has started. Also, when the shutter is open, the camera cannot measure light and tell the flash to stop.</p></blockquote><p></p>
[QUOTE="Felisek, post: 433306, member: 23887"] Fred, this is not how iTTL works. In iTTL mode the flash sends a low-level flash, with the lens wide open, before the mirror is raised, so the camera's meter can measure the amount of light reflected from the subject. Then, the camera decides how much light is required, sets the flash's power to the the appropriate level and takes the picture. PS. I don't think you can control flash duration. There is a capacitor in the flash unit and when the flash is triggered it is discharged into the flash tube. I don't think you can stop this process, once it has started. Also, when the shutter is open, the camera cannot measure light and tell the flash to stop. [/QUOTE]
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Nikon DSLR Cameras
D750
Does Metering System works with Flash ?
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