Dao
No longer a newbie, moving up!
Oh ok. I was suspecting that. But the canon top of the line 580 ex is rated at GN 58 and this one is GN 53. Lets say its a low brightness etc. Still wont 2 (double the output) at least match up to one 580 ex ? But i was using 4 of these that too.
GN is kind of tricky sometimes. You need to make sure all other criteria are the same when you compare.
i.e. ISO, meter or feet, flash head focal length setting.
The GN53 on YN460 is based on - at 35mm focal length, ISO 200 in meters (copied from Yongnuo site)
While most of the GN number are based on ISO100 such as the 580exII GN58. ISO100 with flash head at 105mm