GN is guide number. A higher guide number simply means it produces a brighter, more powerful flash when used at full power. The higher the guide number the better one can deal with difficult exposure situations, such as subjects far away from the camera or the use of reflectors. Because the head both rotates and tilts, it can be bounced off the ceiling when the camera is held vertically and the flash is mounted on the hot shoe. Paul
> What does "GN" mean? The swivel head and being able to make bursts sounds > like neat features. > > Shel > > > > [Original Message] > > From: Sylwester Pietrzyk > > > > Higher GN (40 at 50mm/iso100 vs. 30 in Pentax), swivel head (AF360 has > only > > tilt movement), "Multi-Pulse Flash Function" - burst of low power flashes > > that enables you to catch subject's movement steps on one frame. > >
