Sony A7 V Questions about focus stacking with flash

[CCRphoto]

I'm an underwater photographer who is considering upgrading equipment to an A7 V, and being a glutton for punishment and pushing the boundaries I am wanting to try focus stacking underwater - wish me luck!

The questions I have relate to the frame rate when focus stacking / focus bracketing.

When selecting the Shooting Interval it gives you the option of
- Shortest
- 1 Second
- 2 Second
- 3 Second etc.

What actually determines the FPS when you choose "Shortest"?

 

[iamdlewis]

What actually determines the FPS when you choose "Shortest"?

The shutter release reset. There are two factors involved in this, the first is your shutter release setting and the second is the maximum performance of the shutter.

Your Shutter Release can be set to Focus Priority, Balanced or Release. The Focus will only trigger the next shot when the AF thinks it has focus on something, the Release will trigger with the least amount of time is possible regardless of focus and Balanced is somewhere between those.

The maximum release speed will depend on if you are shooting mechanical or electronic. So in mechanical the A7V can do 10fps, so basically the camera can take an image every 1/10 of a second, so the shortest time between shots will be about 1/10th a second. In electronic you can do 30fps so the shortest time between will be about 1/30th.

Good luck with this. It is difficult enough to do without the constant movement in water.