Paul_K Offline Upload & Sell: Off
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Let me begin to say I don't have any experience with the R2 Radio Transmitter/Receiver nor the Flashpoint zoom Li-on ttl flash, so can't say anything specific on how those work/should work
I however use PW TT5 (radio, TTL enabled) Transmitter/Receivers, in combination with Nikon speedlights like the SB800
Based on that background, I wonder if the R2 and Flashpoint zoom (and SB800) should set up in a similar way as with the PW TT5's in combination with your R2 triggger/receivers
Let's to make things simple assume you shoot using the camera's TTL flash mode
With the TT5 (and I suspect the R2 as well) set up of th etrigger on the camera is simple. Just attach the (in my case) TT5, switch everything on starting from the top ( so, if you als have a speedlight on top of the trigger, 1) speedlight, 2) trigger 3) camera )
Things however become more complicated with the remote flash and trigger.
When you use the 'old fashioned' standard IR (non radio) triggered Nikon CLS system, (by pushing the SEL button on the back of the SB800 you get into the various customizable settings possible) the camera becomes/is to be selected the Master, and the off camera flash as the Remote
The latter (Remote) should also be dialed on into the SB800's menu. Note that with the SB800 in (old fashioned IR triggered CLS) Remote Mode, you can't change the flash Modes (M, TTl, RPT etc) on the SB800 itself anymore, but only through the camera's E3 menu
If you however work with radio triggers like the TT5's (and possible/probably also the R2's) and only use one remote flash (and don't remotely through the E3 option in your camera's Custom Menu play around with the power settings) things are far simpler
The choice of channel (A,B or C) on the camera mounted trigger is not important (if you do want to play around with that, check your manual, a bit too much to get into in this post)
Since you only have one remote (receiver) and don't mess with the settings, choosing A, B or C on the receiver (the off camera flash, and in your case R2) are moot as well
However; the settings on the SB800 itself are important as well.
When I have a Nikon speedlight on top of the TT5 trigger off camera, it is very important NOT to mess around with the 'Master/Remote' settings, NOR the various power/metering Modes TTL, P, RPT etc on the SB800.
With the TT'5's, I just keep the SB800's Master/Remote option on Off, and the Mode on TTL (so basically the same set up as when you use a SB800, without trigger, directly mounted on yor camera, in TTL metering mode)
The electronics of the TT5's (and probably your R2's as well) simply overrule those settings, and operate based on whatever your R2 on camera trigger's info is.
Obviously the whole above is written based upon my experience with PW TT5's and a Nikon SB800
But the technology of many of the Chinese (basically copy) TTL radiotriggers and speedlights (which BTW does not imply I automatically find them inferior, they simply were not around yet when I bought my more expensive PW TT5's) works I suspect in the same way
HTH
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