What this is

The sacrifice camera is the camera that fires halfway through the exposure so the flash syncs on light instead of relying only on the mechanical shutter timing.

A flash trigger is mounted on top of the sacrifice camera. When that camera fires, the trigger sends one signal to all of your flashes at once. One flash trigger can drive one or multiple flashes.

How to use it

1. Enable accuracy compensation for the group you want to shoot with flash.
2. Mount your flash trigger on the sacrifice camera.
3. Leave the sacrifice camera on the default last camera, or choose a different camera from the dropdown in the sacrifice panel.
4. Use Auto (half exposure) to start from the midpoint of the current shutter speed, then fine-tune with Shift by if needed.
5. Use Manual only when you want to enter a fixed millisecond delay yourself.

Important

The image from the sacrifice camera is intentionally discarded. It is not downloaded and you will not see it in your dataset.

We have seen better results on Canon cameras, especially when using the popup flash, with a shift between -5 ms and -2 ms. Test to confirm what works best with your current configuration.