A heuristic for non-TTL strobes and nailing exposure?

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crashwins Contributing Member • Posts: 540
A heuristic for non-TTL strobes and nailing exposure?

In the studio I have no trouble with nailing exposure when using my AD600...I typically use the same 47" Octa in the same position...

The other day I was using an AD200 with a client outside and relying on TTL. Some of the shots were perfect, others weren't (I mean that with no changes in ambient light over the course of like 10 mins). I imagine the exposure was changing due to the camera.

This is my question:

Say I use the same modifier in the same position/distance with the same light and shoot at aperture priority always on the same f-stop (say F2), shouldn't I be able to quickly select my power based on shutter speed? I am strictly talking about outdoor shots. I am asking because I would like to rely on manual mode more and use my AD600, but I want to be able to more quickly select power and not waste time and my client's patience. Thanks!

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