Review on Yongnuo YN 622N Wireless Trigger Transceivers by Juan Simpson

I bought 3 Yongnuo YN-622N with Yongnuo YN-622N-TX and I was very happy with the purchase. However, I was so disappointed when testing the transceivers on the Nikon D600 and D7000. In TTL mode, all transceivers showed clear underlight. On my SB-900 and SB-600 the exposure was about 1 stop. With the Neewer VK750 II i-TTL flash, the exposure was more than 3 stops. This problem persisted whether I used them remotely via the 622N-TX or the right stack above the camera. All flashes worked perfectly with PocketWizard FlexTT5, MiniTT1 and AC3. As some other users have pointed out, the pre-flash was very powerful, much more powerful than what I've seen on a Nikon CLS or PocketWizard system.