yongnuorf603c

Dear Bro & Sis, I had read up YouTube and tutorials but my trigger just can't work on my Canon 80D. Canon 80D 2 x Yongnuo RF603C II Flash Canon 430RX II 1) Set both triggers to same frequency, in my case only number 3 is pushed up 2) Set to TRX 2) Ensure my Flash is in manual mode...