I ordered two of these flashes together with the RF-603 radio transmitter. With my Nikon SB-600, I would have had the opportunity to address 3 flashes with a radio transmitter. Unfortunately, solving the Yongnuos sporadically from the RF-603. I have researched a few hours on the internet and vice hear me among friends. Accordingly, persistent reports of this phenomenon. While much of is satisfied with the communication with the RF-603, it seems often to come to this phenomenon. The blue light, indicating a willingness to wireless communication indeed reacted as if the lightning had thrown, but actually happens not just happen every few times and sometimes. A reasonable work is not possible. Quite different to the RF 602nd Here goes flawlessly. And yes, I have the sending device configured on the flash and yes, I have the channels adjusted. All other modes are no defects, so that I can operate the lightning at least as a slave. With the RF-602 I can operate wirelessly the Yongnuos then. Unfortunately, the 602er but do not work with the Niko flash. Well, I can live with it, but in my case the product does not deliver what is in the function description. For the rest (processing, ease of use), there are still advantages. According to the Stern definition I'm somewhere between 'do not like' and 'not bad'. Since I decided initially to live with this condition (triggering with RF-602, thus limiting the comfort) I round on 'not bad' on. This gives 3 stars.
