I watched a Kelby One lesson and per course purchased a Yongnuo YN560-TX manual controller to trigger my Nikon SB900 off camera with a softbox. Do I need to purchase something else to make this work (R-603 II or something). New to this and didn't mention in class. I have searched everywhere trying to figure this out because it doesn't work as is with D600, SB900, and the YN560-TX II manual controller.
2 Answers
The YN-560-TX, as a dedicated radio transmitter requires a radio receiver to trigger a remote flash. The SB-900 does not have one built-in, so you need to add one onto the foot of the flash. You can use the RF-602, RF-603, RF-603 II, or RF-605. But all you will be able to do is fire the flash remotely. The YN-560-TX and an RF-60x cannot communicate TTL, HSS (use a faster shutter speed than your camera body's sync speed), or remote power/settings control. This gear is manual-only.
You would actually have more control (TTL, remote settings control) over an SB-900 if you used it as a "smart" optical (CLS/AWL) off-camera flash while using the D600's pop-up flash as your CLS commander.
To get similar control over radio, you could also use iTTL-capable radio triggers: the Yongnuo YN-622N, Godox X1R-N, Phottix Odin II, etc. etc. There are dozens of these types of radio triggers on the market today.
The YN-560-TX is actually best paired with the YN-560 III, YN-560IV, YN-660, or YN-560Li units, which have built-in radio triggers that allow for remote zoom and power control. But. In Yongnuo's system, you cannot mix manual and TTL gear, as you can in Godox or Phottix's systems.
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The Yongnuo YN560-TX II has a radio transmitter made to communicate with Yongnuo manual flashes with built in radio receivers that use the YN560/RF605/RF603 protocol.
Your SB900 has an optical receiver for Nikon's CLS/AWL wireless flash protocol.
Although the Yongnuo YN560/RF605/RF603 manual protocol and the YN622 TTL protocols are mostly incompatible, YN622 devices made since the end of 2014 can be set to receive YN560-TX signals to control manual flash power and manual zoom head settings as well as fire the flash. If you set a YN622N II to 'YN560 Rx' mode and attach it to your SB900 it should allow you to control the power and zoom head setting manually from the YN560N-TX attached to your camera and fire the flash in sync.
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If you want to use your SB-900 I suggest to just start with a pair of RF-603 IIs. Later you can extend your system with the YN-560 III or newer YN-660 and then it makes sense to get an YN 560-TX.
One addition: Having one TTL flash helps. You can also control the TTL flash YN-685 using the YN-560TX in manual mode. However for off-camera flash I see no reason to use TTL anyway. As you already have the SB-900 this tip comes to late for you of course.
– Banzai Apr 08 '19 at 08:29