Unable to control flash power on transmitter hotshoe once X-TTL firmware for Canon is installed

edited February 12 in V6 II Problems
I use a Viltrox JY-610C as a lightweight on-camera fill flash. Since it's not included in the list of flash profiles, I just change the settings to
  • camera system: Canon
  • flash system: Canon
  • flash profile: auto Canon
When Multi-brand HSS firmware (1.1.013) is installed, I have no problem controlling the power of the JY-610C which is mounted on the transmitter.

However, I can no longer adjust the power of the flash once the X-TTL firmware (CAN.A.004) is installed. Changing the settings on the flash, on the camera, or on the trigger (Menu button + scroll) does not change the flash power whether in manual or TTL. The same issue occurs when using a Yongnuo YN-468.

Since I need on-camera TTL fill flash for what I shoot, I'll probably have to stick to the Multi-brand HSS firmware until a fix/workaround for this issue can be found.

Comments

  • edited February 13
    Update:
    For V6II with X-TTL installed, both the Viltrox JY-610C and the Yongnuo YN468-II cannot have their flash power adjusted when they are mounted on the V6II (functioning as Tx); they always fire at full power.

    There also seems to be some sort of synchronization issue since the flash often fires without the light output actually contributing to the exposure of the picture being taken.

    However, these problems do not occur when a Nissin Di866 II is used instead (though I would rather not resort to this since it's far too heavy as on-camera fill flash).Scratch that. The connection between the V6II and the Di866 II is pretty iffy; I'd rather not use it during shoots

    Am I correct in assuming that X-TTL only works for flash models with predefined profiles? Would it be possible to have a firmware version that allows TTL passthrough while allowing X-TTL for remote flash units?
  • Additional details:
    When switching from OFF to TX, the V6 II is unable to automatically recognize the Viltrox JY610-C and Yongnuo YN486-II as Canon-compatible speedlites.

    If the flash system is manually set to Canon, the screen of the JY610-C is able to display the current aperture value used by the camera. This suggests that there is some communication actually taking place between the camera and the flash. However, both the trigger and the camera are still unable to change the flash power settings.
  • edited February 23
    Seems like the A protocol kills off hotshoe compatibility on the V6 II for Canon.

    On 1.1.013, TTL pass-through was still working fine.

    Using the multibrand HSS firmware V62.A.001, I can't get any flash (Viltrox JY610C, Nissin Di866 Mark II for Canon, YN486-II for Canon) to work in any configuration (on-camera trigger TTL pass-through, on-camera trigger manual, off-camera slave triggered by on-camera RF60X).

    scenario:
    off-camera V6 II (RX) with Di866 II triggered by on-camera RF60X
    result:
    - Power can be adjusted manually; correct power output is used when the "test" button of the RF60X is pressed.
    - The slave flash does not fire when the shutter of the camera button is pressed.


    scenario:
    off-camera V6 II (RX) with JY601C triggered by on-camera RF60X
    result:
    - Power CANNOT be adjusted manually; full power is always used when the "test" button of the RF60X is pressed.
    - The slave flash does not fire when the shutter of the camera button is pressed.


    scenario:
    on-camera V6 II (TX) with Di866 II
    result:
    - Flash fires when the "test" button of the V6 II is pressed.
    - The slave flash does not fire when the shutter of the camera button is pressed.


    scenario:
    on-camera V6 II (TX) with JY601C
    result:
    - Flash fires when the shutter button is pressed, but the timing is out of sync since the flash does not appear in the captured picture.
    - On one instance when the flash does fire with the correct timing (using TTL pass-through), the power could not be adjusted

    -------------------------------

    So far, I've had no issues with the functionality between the V6 II and the RF60X, but pretty much anything involving the hotshoe of the V6 II has been nothing short of a nightmare. I'll probably buy a few more RF60X units in the next few months, but it'd be nice to have something lighter as a functional on-camera fill flash.

    I absolutely love the button layout, menus, and cross-camera brand/model functionality (specif. the AF assist lamp for both DSLRs and mirrorless), so I'm really hoping that the compatibility issues could eventually be also ironed out at some point in the future.
  • Welcome to today's monologue (2019-02-25).

    I was playing with the CAN.A.004 firmware again, and I got the TTL to occasionally work with the Nissin Di622 II on top of the V6 II (TX). I'm seeing a success rate of about 1 every 20 shots though: The pre-flash always fires, but the main flash for the exposure itself hardly ever fires.

    In the case of TTL using the Viltrox JY610-C, the main flash fires consistently, but it seems to be locked at 1/16 power (which I suspect is the power of the pre-flash).

    However, there's one behavior that I found pretty consistent in manual mode:
    On both the Nissin Di622 II and the Viltrox JY610C-C, the flash power can be set manually by pressing the "test" button on the V6 II trigger.

    I think the problem basically boils down to the V6 II trigger not being able to set the power of the flash if it is triggered by the camera shutter.
  • @Jonathan_M

    scenario:
    on-camera V6 II (TX) with Di866 II and on-camera V6 II (TX) with JY601C

    Please set the flashes into TTL mode. You also need to turn on the TTL mode on the V6 II by pressing and holding the MENU button for 3 seconds, or you can go to V6 II's MENU, go to and activate the on-TTL mode.

    I hope that helps.
    Ray Chan

    Senior Product Specialist
     
    Cactus®
    Harvest One Limited
  • edited February 26
    raychan said:

    Please set the flashes into TTL mode. You also need to turn on the TTL mode on the V6 II by pressing and holding the MENU button for 3 seconds, or you can go to V6 II's MENU, go to and activate the on-TTL mode.

    Yep, been doing all that since day 1.

    Speaking of TTL pass-through, the Viltrox JY610C tends to misfire quite a bit more often with the V62.A.001 compared to the 1.1.013. After adjusting flash exposure compensation on the camera, the first shot is severely underexposed and the expected flash output is applied from the second shot onwards.

    My current workaround is
    1) change the flash exposure compensation on the camera (EOS 600D)
    2) switch the V6 II off
    3) switch the V6 II on again.
    This ensures that the correct flash exposure compensation setting is applied immediately on the next shot.

    ---

    So, yeah. The JY610C is a quirky little thing despite supposed compatibility with Canon's ETTL, but at least it isn't as hopeless at the Yongnuo YN468II.

    The Nissin Di866II is the flash I've had the fewest issues with, so if Nissin's i40 is just as problem-free, I might get one of those for on-camera fill flash.
  • edited April 29
    Update for X-TTL testing with a new flash:

    scenario:
    on-camera V6 II (TX, CAN.A.004) with Canon EL-100 (released on October 2018) on the V6 II hotshoe

    result:
    • For TTL:
    -Works fine. Exposure compensation is applied correctly whether the setting is changed in the camera or on the V6 II trigger.
    • For manual:
    - No dice. If the flash system is specified as "Canon" in the V6 II, the flash doesn't fire at all regardless of specified flash profile or flash power.
    - The flash will pop if the flash system is set to "manual flash". However, this will always fire at maximum power (the Canon EL-100 has no physical controls for adjusting flash power).
    - In contrast to this, the camera can manually adjust the power settings of the EL-100 if the flash is directly mounted (i.e. no trigger in between).

    So, yeah. It looks like this combination will allow me to stick to the X-TTL firmware. Even though I'll primarily be relying on manual for the two RF60X units that I have, it's nice to have TTL also as an available option.
Sign In or Register to comment.