I've decided to make a series of photographs with portraits in front of distorted buildings. When I distort them with movements, I get very shallow DOF, so I need to use f64 (tried f32 - not sharp enough). My flashes aren't powerful enough to correctly expose the person at that aperture, so I am thinking about focusing to the person, take one exposure with flashes at about f8-f11, and then close it down to f64 and expose for the background.

The problem is that I am new to the night/long exposure photography. I've made a couple of test shots. Here's the ruined one:


The flashes worked twice, since it was a long exposure. I metered the scene it was about 12min at f32. I didn't make any compensations for the reciprocity, and it came out overexposed. The film is cross-processed, maybe that might effect somehow.

Anyway any tips on exposre or which parts to meter? I am shooting expired ektachrome 100


Thanks