The X1-C transmitter and it's hot shoe.
So the past couple of days I have been doing a little testing of the hot shoe on the X1 transmitter. I am still having some inconsistencies as well as some really bizarre issues, plus I was unable to test the Godox TT850 because all my batteries were junk so further testing is required. I will update this post as I gain more experience in using the X1's hot shoe.
Tested the following equipment on the X1 hot shoe so far: Yongnuo YN 600EX-RT and YN-E3-RT, Canon 600EX-RT and ST-E3-RT, Mitros+, and Godox TT685. Will test the TT850, manual only flash, when the new batteries arrive. Gotta love those $33, model specific Li ion batteries. Thankfully Godox dumped that idea and went back to using AA batteries with the TT685.
First off there is no information that I can find on using the X1 hot shoe so I was going in blind with no idea of what to expect. I quickly learned that the hot shoe on the X1 is not a "TTL passthrough" hot shoe like that on the Phottix Strato II. Of course the Strato II is not a TTL radio trigger like the X1 so it would stand to reason that there would be a difference. Since Canon's ETTL system can only deal with one ETTL device at a time, I was doubtful that I would be able to do with the TTL X1, what I have been able to do with the non TTL Phottix Strato II. If you have experience with the Strato II or another non TTL radio trigger with a "TTL passthrough" hot shoe then you will be disappointed to find that the use of the X1 hot shoe is very limited in what you can do.
If you'll remember I mentioned in a previous post about the X1 automatically controlling the HSS feature of Slave flashes, and automatically switching to HSS when the camera's shutter speed is set higher than the cameras max sync. When a Canon compatible TTL flash is placed in the X1 hot shoe, it automatically takes control of the flash through the TTL communication pins. It puts that flash in Group A of the X1 Wireless system regardless of any settings in the flash itself (the exception being the TT685). Whatever wireless flash mode, that is set for Slave group A in the X1 transmitter, is also set in the ONC (on camera) flash no matter what wireless configuration the flash is set to. I will give that a little time to sink in and for you to reread that a few times. Now each flash is different as to what wireless configurations can be set and this is where things have gotten bizarre. I will explain my findings for each flash, just be forewarned if you thought, you could put a TTL flash in the hot shoe, and control it from it's own menu, while you controlled OFC (off camera) flashes with the X1 transmitter, you would be wrong. Like I already said but it bears repeating, the X1 hot shoe is not "TTL passthrough" so any TTL flash in the hot shoe is going to be controlled by the X1 transmitter. The exception would be a manual only flash with no TTL pins. I could not test my TT850 as I previously stated but I did test the YN-E3-RT in the "Legacy" mode which disables the TTL pins except for the large trigger pin. I was able to get it to control and fire OFC flashes using the RT system but I had some inconsistencies so I need to test further.
When using the Canon 600EX-RT or YN600EX-RT you have the ability to switch between the "Wireless OFF" and the "Wireless Master RT" configurations (just a note here: I do not deal with any "Optical Wireless" configurations, ever. Although these flashes are capable of "Wireless Optical" I only deal in RT so, "NO" I did not and "NO" I am not going to conduct any tests in the "Wireless Optical" configurations). To continue.... Trying to set any other Wireless configuration will result in the X1 switching the flash back to the "Wireless OFF" configuration. Now personally I had previously envisioned only being able to use the flash in the "Wireless OFF" configuration, in the ETTL mode as this is the setup for most TTL radio triggers. Well as I mentioned the X1 is proving to be a very different radio trigger in that it takes complete control of any flash in it's hot shoe. This applies to both the X1 transmitter or receiver hot shoes. Unlike other TTL radio triggers that need the Canon compatible TTL flash to be in the "Wireless OFF" configuration, ETTL mode the X1 doesn't seem to care, it just does what it want or what it needs so if it is not in that configuration, it will be as soon as the X1 is turned on. The exception being the "Wireless Master RT" configuration which it does allow. More on that to follow but first a bit of digression and repetition.
As mentioned most TTL radio triggers require the Canon compatible TTL flash to be in "Wireless OFF" configuration, ETTL mode to work with their system and it is never displayed on the flash itself, the mode or flash power that is set in the transmitter (there may be some exceptions I am unaware of). The X1 takes control of the flash and if it is set to TTL then the flash goes into TTL. If the X1 is set to Manual mode then the flash goes into Manual mode and the flash output, set in the X1, is displayed on the flash. As I previously mentioned, HSS is automatically set in the flash right from the start so it is ready to switch as soon as the shutter speed exceeds max sync. When I first figured this out I thought it was a great idea but I have since thought of a lot of situations that I would not like this type of an automatic feature. I have been known to accidently make changes to shutter speeds and the last thing I would want is to loose about 2 stops of flash power by accidentally changing from 1/200 to 1/250. I accidently changed the FEC in the camera one time while I was changing the ISO setting (I never use the FEC in the camera...never, never, never) . I accidentally dialed in about -1 FEC and it took me about 5 minutes to figure that one out (flash exposure under exposed by 1 stop so I dialed in +1 FEC into the flash now flash over exposing by 1 stop...it messes with your mind). I kind of think I would rather have control of choosing when to turn HSS ON or OFF. It is a feature of the X1 system so I guess one has to live with and be aware of it.
Back to regular programming. In the "Wireless OFF" configuration (in reality this is the way you should use this setup) the X1 controls all Wireless Modes, Manual flash power adjustments and FEC adjustments, in the flash in the hot shoe, as part of the X1's Group A. NO ADJUSTMENTS ARE MADE, NOR CAN THEY MADE, IN THE FLASH ITSELF. This means that the hot shoe is not a "TTL Passthrough" hot shoe in the true sense of the word. The X1 does all the communicating with the camera and tells the flash what to do. The flash in the hot shoe cannot communicate with the camera which it could if this were truly a "TTL Passthrough" hot shoe. This makes sense, since this is a TTL radio trigger and it's TTL communication, with the camera, takes precedent over any ONC flash. Remember that the Canon ETTL system cannot communicate with two separate ETTL devices. This is evident when you switch the flash to the "Wireless Master RT" configuration. When the flash is in this configuration ETTL does not work in the flash itself nor in any of the Slave flashes being controlled by the flash as a Master. LOL I just heard necks snap and eyelids pop open.
Yes you heard me right and this is what has been driving me crazy, and taking so long in testing and retesting, but before you start thinking of all the creative lighting setups you are going to do with this type of dual Master arrangement be warned. I have spent hours testing all these new, bizarre behaviors to where I am confused, tired and plain ole befuddled. I do not have the patience or the space to write down all that I have found that I can do or can't do when the flash is in the "Wireless Master RT" configuration. If this is something you might be interested in then buy some X1's and experiment with it but I am done. I never planned to ever use the X1 transmitters hot shoe in the first place but it intrigued me after reading this article from Lighting rumors where they mentioned that it had a "TTL Passthrough" hot shoe. http://www.lightingrumours.com/godox-x1-c-7462
I did not see how that would be possible with a TTL radio trigger and come to find out, in my way of thinking of the definition of "Passthrough", and in my experience of using a radio trigger with a true "TTL Passthrough" hot shoe, the X1 is not, nor could it be.
IN SUMMARY:
The hot shoe on the X1 is a doable solution for an ONC flash but, with a flash as big as the 600EX's there is a whole lot of swaying going on to where I would be afraid that any sudden movements would snap the foot right off the X1. This is the weak link in the whole deal not to mention this type of arrangement, even with a smaller flash or another radio trigger in the hot shoe, is bulky. I will still choose the Canon RT system, using RT receivers and RT flashes, long before going back to integrating two systems by using a transmitter, stacked with a flash in the camera's hot shoe. I went this route for a while with the Strato II and the Canon Wireless RT 600EX-RT or ST-E3-RT in the Strato II hot shoe and although it accomplished what I was trying to do, it sucked. There is something to be said for simplistic and minimal solutions.
As far as the X1-C is concerned, the more I use it, the more I like it. It had a few issues which I was able to fix to where it is now reliable and works. If I was in the market for a cheap TTL radio trigger, I would definitely buy the X1-C, long before buying a Yongnuo YN622c or most other cheaper TTL radio triggers for that matter. After comparing the X1-C side by side with the Phottix Odin it is easier to use and a whole bunch cheaper. If the X1-C has good range, I yet to find the time to test that, then it will definitely be a keeper.