The TTL flash metering with the Metz 386 adapter for Bronica SQ-Ai and ETRSi will function fully, regardless of the presence or absence of a metering prism on the body!!!
If you want flash to be brighter than ambient, simply dial in a lower ISO value on the Metz 386 adapter than the actual film speed; if you want less light than ambient, dial in a higher ISO value on the Metz 386 adapter, than the actual film speed. If you have a metering prism, you can independently set the ISO of the metering prism from the ISO value set on the Metz 386 adapter.
I've found that Metz flash work very well in 'Aut0' mode, too.
Also with Sunpaks which take the BR-1D adapter.
Originally Posted by wiltw