Let’s establish a few ground rules for what we are going to be doing. First, this isn’t an ETTL, CLS, or any other kind of electronic exposure control in the flash unit. We are talking about manual settings. Manual is where the power is.
We also must make a few demands for the units themselves: They must have variable power, some way to fire them off camera (Sony strobe units are pretty proprietary I have seen) and they should have some sort of “Zoom” for the light. This last part isn’t mandatory, but it does offer some great flexibility.
