Just ordered Sunpak 383 Super unit for my 6x7. Never used any but TTL flashes in the past, so no experiences with manual flash exposure, auto-apertures and whatsoever. I'll appreciate any help clarifying how to use all that.
After reading a general stuff I understood few things: 1. All the calculations are made based on GN provided for particular flash.
2. Since the standard GN is for aperture of f/1.0, to obtain a real distance coverage of the unit I have to divide that GN by the particular aperture used to the shot, right ? For instance, shooting at f/8 by a flash gun having GN = 120 feet (about 40 m) I get 40/8 = 5 meters actual distance coverage. What does that mean ? A full flash power at 5 m distance ?
4. What is the principle of using auto-aperture ? Setting f/8 on the flash unit, what it will result to ? Does that mean the flash unit will adjust its output to provide its maximum power for 5m only thereby concerving the remaining power (faster recycling ?) ?
5. What general differences between fully manual and auto-aperture modes ?
6. If I need a gentle fill-in only, how what I set the flash in auto-aperture and fully manual modes ?
Thanks in advance, Alex