Increase the aperture of the camera and slow down the shutter speed.

Lighting, flashing lights or studio lights.

As for exposure, first of all, we must measure light (comprehensive light source brightness). Then adjust the aperture according to the photometric data. If a large aperture is needed, 1. Reduce illumination; 2. Add a reducing mirror. As long as the speed and aperture match (there is no requirement for speed in the photo).

1125 means that the flash synchronization speed cannot be higher than1125s (for example, 1/250, 1/500 ...) and lower than1/kloc.

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