Yesterday night I and two of my colleague doing some practical session of strobist.. we had this session at our site camp just nearby our cabin.. at first we decide to do the session at the tennis court.. however.. it is too bright & it is too windy.. even my light stand and umbrella had blown away and cause a little damage to the black umbrella.. then we decide to shift it to other place where its a litle dark and not so windy..
so.. we finally setup the light as below..
one SB900 set in SU4 mode infront 45 deg from the subject with 1/32 power at about 1.2m high shoot through white umbrella zoom at about 25mm..
one SB900 set in SU4 mode at the back 45 deg from the subject with 1/64 power place it high on the light stand at about 10 feet.