The Interfit Flash Meter is a simple, very effective flash meter that takes both incident and reflected light flash-only measurements. Connects to the PC cord of a flash or strobe.
Accuracy is to + - 1/3 of a stop with range at 100ISO
Reads F2 to F32 in 1/3 stop increments. Can be set to ASA readings: 12,20,50,100,200,400,1000