YN***0II  Speedlight with GN*3 for Canon Nikon Pentax Olympus DSLR cameras

It is the best recommandation as a slave flash for photography. 
It has Optical Slave and Fully Manual function, and most important, the GN number is increased to *3.

 Technical parameters:
* Guide number:
* *8 (at *5mm focal length, ISO **0 in meters)
* *3 (at *5mm focal length, ISO **0 in meters)
* Flash mode: M, S1, S2
* Flash power control : Level *6 light quantity output control with 1/*-stop increment
* Circuit design: Insulated Gate Bipolar Transistor (IGBT)
* Vertical rotation angle : *7~*0 degrees
* Horizontal rotation angle : 0~**0 degrees
* Power: 4 x AAsize batteries (Alkaline or Ni-MH are usable)
* Lighting times: **0 to ***0 times (AA alkaline cell used)
* Recycle time: approx 4s (AA alkaline cell used)
* Color temperature : ***0k
* Flash time :1/**0s~1/****0s
* Dimensions: *2 x **5 x *5mm
* Net weight: **0g
* Accessories: Flash light (1), Protecting bag (1), Mini stand(1) User manual (1)