Yongnuo YN14EX Ring Flash Will Not Work Properly on Canon 90D
My Yongnuo YN14EX Ring Flash worked perfectly on my Canon 550D (Rebel T2i) and on my Canon 760D (T6s). I got perfect exposure with ETTL. However, On my Canon 90D it gives me about 3-4 stops of underexposure at iso 100. The other problem is that the E...