Flashpoint R2n receiver with Yongnuo yn685.

tevans9129 said:

Does anyone know if the R2n and yn685 are compatable? The R2n works flawously with a Nikon SB700 but I cannot get it to even power up with the 685. Any suggestions/thoughts would be appreciated.

Click to expand...

R2N means for Nikon only. Flashpoint does not make any receivers for Yongnuo. R2C means for Canon only. R2S means for Sony only. The Nikon Flashpoint receiver will not work for Yongnuo by design.

nutsandbolts said:

tevans9129 said:

Does anyone know if the R2n and yn685 are compatable? The R2n works flawously with a Nikon SB700 but I cannot get it to even power up with the 685. Any suggestions/thoughts would be appreciated.

Click to expand...

R2N means for Nikon only. Flashpoint does not make any receivers for Yongnuo. R2C means for Canon only. R2S means for Sony only. The Nikon Flashpoint receiver will not work for Yongnuo by design.

Click to expand...

Thanks for the comments but I am somewhat confused. It is my understanding that the transmitter is specific to the camera, ie Nikon, Cannon etc. but the receiver is not specific to a flash. If it is specific, does that mean that only a Flashpoint flash will work from a Flashport transmitter and another brand will not?

tevans9129 said:

nutsandbolts said:

tevans9129 said:

Does anyone know if the R2n and yn685 are compatable? The R2n works flawously with a Nikon SB700 but I cannot get it to even power up with the 685. Any suggestions/thoughts would be appreciated.

Click to expand...

R2N means for Nikon only. Flashpoint does not make any receivers for Yongnuo. R2C means for Canon only. R2S means for Sony only. The Nikon Flashpoint receiver will not work for Yongnuo by design.

Click to expand...

Thanks for the comments but I am somewhat confused. It is my understanding that the transmitter is specific to the camera, ie Nikon, Cannon etc. but the receiver is not specific to a flash. If it is specific, does that mean that only a Flashpoint flash will work from a Flashport transmitter and another brand will not?

Click to expand...

Yup, you are correct. The transmitter is body specific. If your receiver is not working with your Yongnuo flash, the pins might not be contacting the receiver contacts. Just checked with Adorama. The receiver "should" work with your Yongnuo flash.

tevans9129 said:

nutsandbolts said:

tevans9129 said:

Does anyone know if the R2n and yn685 are compatable? The R2n works flawously with a Nikon SB700 but I cannot get it to even power up with the 685. Any suggestions/thoughts would be appreciated.

Click to expand...

R2N means for Nikon only. Flashpoint does not make any receivers for Yongnuo. R2C means for Canon only. R2S means for Sony only. The Nikon Flashpoint receiver will not work for Yongnuo by design.

Click to expand...

Thanks for the comments but I am somewhat confused. It is my understanding that the transmitter is specific to the camera, ie Nikon, Cannon etc. but the receiver is not specific to a flash. If it is specific, does that mean that only a Flashpoint flash will work from a Flashport transmitter and another brand will not?

Click to expand...

The R2N you are talking about is the reciever isn't it? Are you trying the Nikon version of the YN685? This should work in theory as the R2N thinks it's talking to a Nikon flash and the YN685 thinks it's talking to a Nikon camera.

You do have the YN685 in TTL mode don't you?

tugwilson said:

The R2N you are talking about is the reciever isn't it? Are you trying the Nikon version of the YN685? This should work in theory as the R2N thinks it's talking to a Nikon flash and the YN685 thinks it's talking to a Nikon camera.

You do have the YN685 in TTL mode don't you?

Click to expand...

Yes, the R2n Pro transmitter and the R2 receiver.

The YN685 is a flash and is not dedicated to any specific brand of camera.

Yes, I have tried both TTL and manual.

However, my problem is with nothing involved but the R2 receiver and the YN685, the R2 goes off the moment the YN685 is turned on and if the 685 is turned on first, the R2 receiver never comes on.

With that being said, I have just found a work around for my purpose which is to get flash in low light with a higher shutter speed than 320. If I place the SB700 on the R2 receiver and on channel 2 group B of the R2n transmitter, with a FP 300 strobe on channel two and group A and using the R2n in manual mode, I get both the SB700 and the strobe to fire then I can set the shutter on whatever speed I desire.

I would still like for the YN685 to work with the R2 receiver but that seems not to be the case.

Thanks to all for the comments and suggestions.

tevans9129 said:

tugwilson said:

The R2N you are talking about is the reciever isn't it? Are you trying the Nikon version of the YN685? This should work in theory as the R2N thinks it's talking to a Nikon flash and the YN685 thinks it's talking to a Nikon camera.

You do have the YN685 in TTL mode don't you?

Click to expand...

Yes, the R2n Pro transmitter and the R2 receiver.

Click to expand...

I understand these are both the Nikon version.

tevans9129 said:

The YN685 is a flash and is not dedicated to any specific brand of camera.

Click to expand...

This is incorrect. The YN 685 comes in either Canon or Nikon versions according to flashhavoc.com.

The built-in RF (Radio Frequency) receivers (it has two) in the YN 685 are of no use here as they are not compatible with the Flashpoint/Godox XPro transmitter's Godox protocol. YN 685 therefore needs to be controlled through its foot and with Nikon's ITTL protocol if you have the Nikon version YN 685. Does it work in TTL/HSS (auto FP in Nikon speak) in your camera's hot-shoe? If it does you then may have the expectation it should work on the R2n receiver.

tevans9129 said:

However, my problem is with nothing involved but the R2 receiver and the YN685, the R2 goes off the moment the YN685 is turned on and if the 685 is turned on first, the R2 receiver never comes on.

Click to expand...

You report they don't like each which isn't entirely surprising. IMO the expectation they should work together since they are both Nikon compatible is somewhat naive. Although each unit works fine when it interfaces with a genuine Nikon device it may be incompatible with the reverse engineering used by the other brand.

tevans9129 said:

With that being said, I have just found a work around for my purpose which is to get flash in low light with a higher shutter speed than 320.

Click to expand...

This goal should have been given in your original post. You say "low light" implies the ambient light is low so why the need for high shutter speed? With the flash illumination being dominate its duration should be sufficient to stop normal subject/camera motion allowing normal flash sync.

• John

--
"[If you don't sweat the details] the magic doesn't work." Brooks, F. P., The Mythical Man-Month, Addison-Wesley, 1975, page 8.

fotowbert said:

tevans9129 said:

Yes, the R2n Pro transmitter and the R2 receiver.

Click to expand...

I understand these are both the Nikon version.

Click to expand...

Yes they are both Nikon.

fotowbert said:

fotowbert said:

The YN685 is a flash and is not dedicated to any specific brand of camera.

Click to expand...

This is incorrect. The YN 685 comes in either Canon or Nikon versions according to flashhavoc.com.

Click to expand...

You are correct and the YN 685 is for Nikon.

fotowbert said:

The built-in RF (Radio Frequency) receivers (it has two) in the YN 685 are of no use here as they are not compatible with the Flashpoint/Godox XPro transmitter's Godox protocol. YN 685 therefore needs to be controlled through its foot and with Nikon's ITTL protocol if you have the Nikon version YN 685. Does it work in TTL/HSS (auto FP in Nikon speak) in your camera's hot-shoe? If it does you then may have the expectation it should work on the R2n receiver.

Click to expand...

Yes, it works from the hot shoe. However, what difference does it make if I am not using the RF in the 685?

fotowbert said:

fotowbert said:

However, my problem is with nothing involved but the R2 receiver and the YN685, the R2 goes off the moment the YN685 is turned on and if the 685 is turned on first, the R2 receiver never comes on.

Click to expand...

You report they don't like each which isn't entirely surprising. IMO the expectation they should work together since they are both Nikon compatible is somewhat naive. Although each unit works fine when it interfaces with a genuine Nikon device it may be incompatible with the reverse engineering used by the other brand.

Click to expand...

Apparently, they are incompatible which I understand if using the RF in the 685 but I cannot understand why the R2 receiver cannot fire the flash when used as a dumb slave.

fotowbert said:

fotowbert said:

With that being said, I have just found a work around for my purpose which is to get flash in low light with a higher shutter speed than 320.

Click to expand...

This goal should have been given in your original post. You say "low light" implies the ambient light is low so why the need for high shutter speed? With the flash illumination being dominate its duration should be sufficient to stop normal subject/camera motion allowing normal flash sync.

• John

Click to expand...

My goal was not the point of my question which was, should the YN685 work with the R2n receiver. I want to use shutter speeds of 3000 to 4000, an aperture of at least 5.6 with the lowest ISO possible. Therefore, I need substantial light.

Thanks John for all the info and you observations.

Ted

tevans9129 said:

fotowbert said:

Does it work in TTL/HSS (auto FP in Nikon speak) in your camera's hot-shoe? If it does you then may have the expectation it should work on the R2n receiver.

Click to expand...

Yes, it works from the hot shoe. However, what difference does it make if I am not using the RF in the 685?

Click to expand...

Camera top/hot-shoe mode is what the YN 685 needs to be in when on the RX (receiver unit) so you have confirmed the 685 is working in that mode.

tevans9129 said:

tevans9129 said:

You report they don't like each which isn't entirely surprising. IMO the expectation they should work together since they are both Nikon compatible is somewhat naive. Although each unit works fine when it interfaces with a genuine Nikon device it may be incompatible with the reverse engineering used by the other brand.

Click to expand...

Apparently, they are incompatible which I understand if using the RF in the 685 but I cannot understand why the R2 receiver cannot fire the flash when used as a dumb slave.

Click to expand...

Preventing contact between the three Nikon proprietary pins on the YN 685 and the contact pads of the RX with tape (or thin plastic sheet with hole for center pin) should allow "dumb" slave operation. All you need is the center pin and ground to fire flash.

EDIT: you could experiment by covering 1 or 2 of the pins and see if that makes any difference in operation. My understanding is the communication is digital between flash and hot-shoe with Nikon's iTTL protocol. Unfortunately my link for this, http://cms.diodenring.de/electronic/microcontroller/110-ittlanalysis doesn't seem to work any longer. The film TTL communication is analog.

You will need the 685 to be in manual power mode so you can set its power on the back of the unit. Unfortunately covering the extra pins will also prevent the 685 from knowing it needs to do HSS pulsing when shutter speed exceeds your max flash shutter speed. Instead you will have to rely on the Hyper Sync (long burn) technique at faster shutter speeds which is what I believe your workaround with the FP 300 is using.

Hyper Sync basically needs the flash burst to last as long as the shutter curtain travel duration and the sync timing to be advanced to the start of 1st curtain travel. Speedlights and some strobes have their longest duration flash bursts at full power due to the use of IGBT circuits for power control. Studio strobes using capacitor voltage control have their shortest duration at full power.

FWIW: The first thing I do when encountering problems with hot-shoe gear is to clean all contact surfaces with a soft white pencil eraser or use DeoxIT contact treatment on them.

• John

fotowbert said:

Preventing contact between the three Nikon proprietary pins on the YN 685 and the contact pads of the RX with tape (or thin plastic sheet with hole for center pin) should allow "dumb" slave operation. All you need is the center pin and ground to fire flash.

EDIT: you could experiment by covering 1 or 2 of the pins and see if that makes any difference in operation. My understanding is the communication is digital between flash and hot-shoe with Nikon's iTTL protocol. Unfortunately my link for this, http://cms.diodenring.de/electronic/microcontroller/110-ittlanalysis doesn't seem to work any longer. The film TTL communication is analog.

You will need the 685 to be in manual power mode so you can set its power on the back of the unit. Unfortunately covering the extra pins will also prevent the 685 from knowing it needs to do HSS pulsing when shutter speed exceeds your max flash shutter speed. Instead you will have to rely on the Hyper Sync (long burn) technique at faster shutter speeds which is what I believe your workaround with the FP 300 is using.

Hyper Sync basically needs the flash burst to last as long as the shutter curtain travel duration and the sync timing to be advanced to the start of 1st curtain travel. Speedlights and some strobes have their longest duration flash bursts at full power due to the use of IGBT circuits for power control. Studio strobes using capacitor voltage control have their shortest duration at full power.

FWIW: The first thing I do when encountering problems with hot-shoe gear is to clean all contact surfaces with a soft white pencil eraser or use DeoxIT contact treatment on them.

• John

Click to expand...

Thanks for all the info and the links John, much appreciated.