Execute or Testfor a named dropped Item?
Use a partial NBT Test to find all items named Camera1 that is a head of a specific player.
Setup:
/scoreboard objectives add isCamera dummy
Clock (20 tps):
/scoreboard players set @e[type=Item] isCamera 1 {Item:{Damage:3, id:397, tag:{display:{Name:Bob}, Skull_Owner:<Skull Owner>}}}
/execute @e[score_isCamera_min=1] <x> <y> <z> <Command>
This will instantly find all Player Heads with the Owner of the <Head Owner> and the name of Camera1 immediately when dropped, or to be specific within 1 twentieth to 2 twentieth of a second, which will not give time for the item to fall.