Cactus V6 II with Pentax 645D - HSS

Hi Cacuts,

I'm a Pentax 645D user and own the following different brands of lights. May I ask if it is possible to use the V6 II with any of those lights in HSS?

1) Paul C Buff - Einstein E640
2) Godox - V850 (1st version)
3) Nissin - Di866
4) Nissin - Di866 Mark II

Thanks
Andy


Comments

  • Hi Andy,

    We haven't tested the 645D but the 645Z works, tested by one of our Hong Kong dealer.

    Paul C Buff cannot support HSS as its flash duration is too short, for studio strobe it needs to be 1/100s at t0.1, but the E640's Flash Duration (t.1) - in Color Mode

    from 1/588 to 1/8,000 second.

    Godox V850 is a manual flash, it does not do TTL nor HSS, so it cannot do HSS with the V6 II.

    Both Nissin models should not be a problem.

    Thanks!

    Antonio Lao
    Brand Manager
    _____________

    To help us better help you, always state the exact firmware version installed on your Cactus device(s), such as: "1.1.013", "FUJ.1.002", "NIK.A.001", "v.103".

    Nikon D750 users please read this thread: 

    Fujifilm EF-X500 users please read this thread:

    Feel free to suggest an improvement or share product ideas. Contact us directly at info@cactus-image.com.  At Cactus, we listen. 
  • edited August 2016
    Antonio,

    The Godox V850 is a manual flash without TTL but it does do HSS.
  • edited May 2017
    EdCody,

    the V850 does HSS but I believe only through their proprietary trigger system. One needs a "Cells II" transmitter and the latter is only offered for Canon and Nikon.

    It should be possible to use the V6II on the 645D and connect it to a Godox transmitter (the standard FT-16 would do) via a cable. That way one should be able to achieve HSS with the V850, but wihtout remote power control through the V6II.

    If there is a way to manually engage HSS on the V850 (as there is on the RF60) then it might be possible to use it for HSS photography with just the V6II, however remote power and zoom control would still not work.
  • You can manually engage HSS on the V850 by pressing the correct button pattern on the back of the V850.
  • @C88
    You can manually engage HSS on the V850 by pressing the correct button pattern on the back of the V850.
    Yes it works!
    We were able to shoot above camera's x-sync speed on the V850 on the V6 II. 

    FYI this is just like the case with the Profoto B1 where we tested by connecteing the V6 II to B1's 3.5mm port via sync cable, and by enabling HSS mode, it works above camera's x-sync speed.

    Thanks for sharing your setup info.

    @andyononlaw @EdCody
    Antonio Lao
    Brand Manager
    _____________

    To help us better help you, always state the exact firmware version installed on your Cactus device(s), such as: "1.1.013", "FUJ.1.002", "NIK.A.001", "v.103".

    Nikon D750 users please read this thread: 

    Fujifilm EF-X500 users please read this thread:

    Feel free to suggest an improvement or share product ideas. Contact us directly at info@cactus-image.com.  At Cactus, we listen. 
  • Thanks for all your comments guys, I'll have to pop over to my local distributors and test it out. Will let you all know for any updates.

    Cheers
     
  • Thanks for all your comments guys, I'll have to pop over to my local distributors and test it out. Will let you all know for any updates.

    Cheers
     



    Hi, did you managed to test it? I'm interested as well, since I own a Pentax 645D, unfortunately there's no Cactus reseller or distributor in my country, so I can't test it, I would have to buy two, to see if it works...

    So, can you please tell me if you did make it work?

    Thanks in advanced.
  • Hello all,

    Good news!

    One of our dealer tested the Pentax 645Z and HSS works on the Cactus V6 II!
    For the test we used a Metz 58 AF-2 (for Canon) set on V6 II RX unit.

    I suppose the 645D runs on the same P-TTL system so it should work as well.

    Thank you!
    Antonio Lao
    Brand Manager
    _____________

    To help us better help you, always state the exact firmware version installed on your Cactus device(s), such as: "1.1.013", "FUJ.1.002", "NIK.A.001", "v.103".

    Nikon D750 users please read this thread: 

    Fujifilm EF-X500 users please read this thread:

    Feel free to suggest an improvement or share product ideas. Contact us directly at info@cactus-image.com.  At Cactus, we listen. 
  • Hello all,

    Good news!

    One of our dealer tested the Pentax 645Z and HSS works on the Cactus V6 II!
    For the test we used a Metz 58 AF-2 (for Canon) set on V6 II RX unit.

    I suppose the 645D runs on the same P-TTL system so it should work as well.

    Thank you!



    Thanks! I'll order a Cactus V6ii right away.
  • Cool! Thank you, @Pablovi :)
    Antonio Lao
    Brand Manager
    _____________

    To help us better help you, always state the exact firmware version installed on your Cactus device(s), such as: "1.1.013", "FUJ.1.002", "NIK.A.001", "v.103".

    Nikon D750 users please read this thread: 

    Fujifilm EF-X500 users please read this thread:

    Feel free to suggest an improvement or share product ideas. Contact us directly at info@cactus-image.com.  At Cactus, we listen. 
  • edited September 2016
    I can verify that the Cactus V6ii works with the Pentax 645D and the Godox AD360ii-C.

    With only 1 Cactus V6ii, and the Godox X1 on top of it, it triggers the Godox Ad360II-C in HSS mode.

    Settings are, Camera autodetect, detects as Pentax, Flash Canon, HSS normal.

    Here's proof, notice the 1/400 of a second on a Pentax 645D which is impossible without HSS.

    https://flic.kr/p/MuJfPx

  • Aww, a cute kitty! :)
    Can we share it on our Facebook page?

    I think other Pentax 645D owners would be happy to know about having off-camera HSS.

    Thanks!
    Antonio Lao
    Brand Manager
    _____________

    To help us better help you, always state the exact firmware version installed on your Cactus device(s), such as: "1.1.013", "FUJ.1.002", "NIK.A.001", "v.103".

    Nikon D750 users please read this thread: 

    Fujifilm EF-X500 users please read this thread:

    Feel free to suggest an improvement or share product ideas. Contact us directly at info@cactus-image.com.  At Cactus, we listen. 
  • Aww, a cute kitty! :)
    Can we share it on our Facebook page?

    I think other Pentax 645D owners would be happy to know about having off-camera HSS.

    Thanks!



    Sure! Thanks!
  • Sweet, thanks a bunch Pablovi for sharing his test result with us. It's definitely an awesome for 645D user to break the barrier of in-camera sync speed without breaking the bank to get crazy expensive flash.

    Thanks a lot!!  
  • edited November 2016
    Hi andyononlaw.

    Although I do not have the 645D, I have posted instructions on how to fire the Godox Ving 850 in HSS mode with a Pentax K3.

    The principles should apply.

    Here are the instructions with images if you are interested:
    http://www.pentaxforums.com/forums/125-flashes-lighting-studio/333936-pentax-hss-cactus-v6ii-godox-ving-850-flash-success.html
  • Glad to hear someone had the Pentax 645 working with HSS.

    I was about to purchase a set, for 645z and Canon 430ex2 / 580 ex2 flash, however couldn't get it to work at the shop. Please let me know if anything isn't done correctly:

    TX:
    camera set to Pentax, shutter 1/160
    Sync to normal HSS

    Rx: flash to Canon

    Flash: ettl w/hss on

    I do see the flash triggering, but camera couldn't capture the flash duration, just a almost pitch black screen. Set camera shutter to 1/125, a blown out picture by the flash.

    Also did some shots at 1/400 shutter, getting 1/3 picture illuminated by the flash.

    Will "learn HSS feature" help resolve the issue?

    Thanks,
    Erik



  • edited December 2016
    ... Will "learn HSS feature" help resolve the issue?



    Hi Erik, LEARN HSS is only for Fujifilm.

    Did you:
    1. Half-press shutter button of the 645 as you switch the V6 II to TX mode?
    2. First switch on the Canon flashes then the V6 II to RX mode?
    Hope this helps.
    Antonio Lao
    Brand Manager
    _____________

    To help us better help you, always state the exact firmware version installed on your Cactus device(s), such as: "1.1.013", "FUJ.1.002", "NIK.A.001", "v.103".

    Nikon D750 users please read this thread: 

    Fujifilm EF-X500 users please read this thread:

    Feel free to suggest an improvement or share product ideas. Contact us directly at info@cactus-image.com.  At Cactus, we listen. 
  • edited May 2017
    Here is my successful test firing the Profoto B1 from the 645z.

    Settings on Cactus V6II

    TX mode
    Camera system: Pentax
    Flash system: Canon
    Flash profile: Auto Canon

  • Hello Dave,
    Here is my successful test firing the Profoto B1 from the 645z.

    Settings on Cactus V6II

    TX mode
    Camera system: Pentax
    Flash system: Canon
    Flash profile: Auto Canon

    Thanks so much for taking the time to put together the video.

    I wonder if you could give us a hand with the 645Z? We need to tune the sync times just using your existing setup - Profoto's Air TTL remote (Canon version).

    In the meantime let me send you a PM with instructions.

    Thank you!
    Antonio Lao
    Brand Manager
    _____________

    To help us better help you, always state the exact firmware version installed on your Cactus device(s), such as: "1.1.013", "FUJ.1.002", "NIK.A.001", "v.103".

    Nikon D750 users please read this thread: 

    Fujifilm EF-X500 users please read this thread:

    Feel free to suggest an improvement or share product ideas. Contact us directly at info@cactus-image.com.  At Cactus, we listen. 
  • No problem. I'm happy to help ☺
  • Thanks for offering your help! ;)
    Antonio Lao
    Brand Manager
    _____________

    To help us better help you, always state the exact firmware version installed on your Cactus device(s), such as: "1.1.013", "FUJ.1.002", "NIK.A.001", "v.103".

    Nikon D750 users please read this thread: 

    Fujifilm EF-X500 users please read this thread:

    Feel free to suggest an improvement or share product ideas. Contact us directly at info@cactus-image.com.  At Cactus, we listen. 
  • I just purchased a Paul C Buff Einstein 640. The E640 does not support HSS.
    The E640 has a feature whereby the unit will flash when it detects a flash from another source. But because the V6ii emit a Pre-Flash, the E640 fires prematurely and doesn't work with the V6ii as a "slave". It does work when an 1/8" male/male connector is used between a V6II and the E640, although one cannot control the amount of light with the V6II. It must be set manually on the E640.

    I suspect that V6's would work as they do not have a pre flash.

    Hint hint hint Cactus ------- why do you need a preflash if not using HSS. Should be easy enough to program in firmware...
  • Pre-flash isn't for HSS, it's for TTL.  The V6 II uses TTL communication protocol to talk to the flash in order to control the power, which is why the pre-flash gets fired.
  • @dougbolton, I guess the E640 does not have an S2 option (as found on speedlights) where it skips the first pre-flash and use the second flash for flash triggering.

    And as @paulster said above, indeed we need pre-flash for HSS / TTL to function properly. Or more precisely, getting HSS requires riding on the TTL protocol.

    But back to what you want to achieve, getting HSS with the E640... from memory this flash model has a pretty short flash duration, so if it does not have an option for you to set for long pulsing flash signal  (the typical HSS /FP modes), then you are out of luck.

    For studio strobes, it's either you get:

    A) "Slow" strobe - long flash duration, longer than 1/100s at t0.1

    or 

    B) "HSS strobe" - one that has the option of firing long-pulsing flash signal

    Cheers!
    Antonio Lao
    Brand Manager
    _____________

    To help us better help you, always state the exact firmware version installed on your Cactus device(s), such as: "1.1.013", "FUJ.1.002", "NIK.A.001", "v.103".

    Nikon D750 users please read this thread: 

    Fujifilm EF-X500 users please read this thread:

    Feel free to suggest an improvement or share product ideas. Contact us directly at info@cactus-image.com.  At Cactus, we listen. 
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