The original post: /r/photography by /u/Suspicious_Fuel_2502 on 2025-01-22 09:32:30.

Hello, I always used two PW’s plus III to shoot with one remote camera. Now I bought plus IV to try to shoot with two remote cameras. Problem. I cant activate my older III PW’s with IV model. But it activates if I use one of III as my main. Why it doesnt works with IV as main?