Traditional Culture Encyclopedia - Photography and portraiture - Why do you want to pre-flash when locking with a flash? Please inform DX.
Why do you want to pre-flash when locking with a flash? Please inform DX.
First let the other person adapt to the strong light through a flash, and then flash and shoot.
Some even turn off the red-eye flash, which will only flash once, but red eyes may appear.
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This is to make the exposure accurate ... Sorry, I didn't see the flash lock ... ...
For photography, the most natural light is the front light, in which case the measured brightness is the most accurate.
If you don't take this step and shoot directly with the flash, the exposure will be a parameter directly predicted by the camera, because the camera can know the current ambient illumination, the brightness of the flash and the synchronization time, but it is impossible to know the distance between the object and the camera, which is directly related to the lighting effect of the flash on the object. So when we shoot with direct flash, it is easy to burn when we are close, and it will be dark when we are far away. Through the pre-flash metering lock, the absolute value of the lighting effects of the flash to the object during the formal shooting can be measured, so the exposure is accurate.
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