With the capability of to control three groups of flashes in its role as a commander the nissin i60a is a powerful versatile flashgun in a compact design its wireless slave ttl functionality can be controlled by another nissin flash unit or by the air 1 commander unit and it has a guide number 60m at iso 100200mm allowing it to cover focal lengths of 24 200mm this can be expanded to reach 16mm using the integrated wide angle diffuser weighing only 300g this lightweight pocket sized acc