Cactus V6 II flash triggers now offer cross-brand TTL

Cactus V6 II triggers now support automatic TTL control between different camera and flash brands.

Cactus V6 IIs

Cactus Image, the Hong Kong photographic accessory manufacturer, has announced a new firmware update to its V6 II and V6 IIs flash triggers. With the latest version, the triggers — which already supported cross-brand high-speed sync — will offer automatic TTL exposure between flash and camera brands.

The new “X-TTL” support means you can mix and match (almost) any camera and flash and still get TTL flash control. Supported brands include Canon, Fujifilm, Nikon, Olympus, Panasonic, Pentax and Sigma. The initial wave of firmware updates are specific to Sigma, Sony and Fujifilm-fit triggers, but the remainder will roll out later.

Also new in this announcement is support for Sigma cameras and flashes, including remote power and zoom control, high-speed sync and wireless TTL support with Sigma’s SA-TTL flashes. Fujfilm now gets high-speed sync support for the EF-X500, the brand’s first flash with HSS.

Using the V6 II transmitter, one can adjust TTL ratios and wireless groups directly from the camera position. TTL flashes can be used either on or off-camera, thanks to universal hotshoes and TTL pass-through. The V6 IIs is a special version of the V6 II that fits Sony’s not-quite-standard Multi-Interface Hotshoe.

Cactus V6 IIs

Handy features of the V6 II and “X-TTL” system include “Flash Power Lock” — which remembers and locks the exact flash output from a TTL exposure — for consistent, repeatable results. The “Flash Compensate” feature adds to this, by fixing the flash exposure but automatically adjusting output to keep it constant when camera settings change.

The triggers are directly compatible with Cactus’s own RF60X flashgun, which supports HSS, TTL and remote power and zoom control.

Cross-brand TTL and HSS has some limitations: Pentax and Sony flashes can only use HSS when triggered by the same brand cameras (but Pentax and Sony cameras can trigger Canon, Nikon, Olympus and Panasonic flashes). Only Canon, Nikon, Olympus and Panasonic system flashes support cross-brand TTL.

The new firmware updates are free to download, when available, from the Cactus Image web site. The Cactus V6 II and V6 IIs are priced $95 per transceiver, available from Adorama, B&H Photo, eBay and other retailers.

David Selby
Based in the West Midlands, UK, David Selby is editor of Lighting Rumours, a part-time photographer and a statistics PhD student.
  • J L Williams

    Is the firmware update actually available now, as the headline states? Or is it simply announced now for later availability?

    • Looks like the latter. Sorry for any confusion.

      • J.L. Williams

        No apologies necessary — glad to know it’s in the works! It’s great that TTL/HSS solutions finally are starting to become available for brands outside the Canon/Nikon/Sony colossus.

        • Wally Brooks

          Ditto i have pocket wizzards for Nikon and was looking for something that gives iTTL capability for Micro 4/3. Pocketwizards work great in manual mode and there are times when auto off camera flash and TTL are required!

      • Chris


        • Chris

          Whoops! Was trying to ask if there is an update on this …er ….update?

      • Chris

        Ive downloaded latest Fuji update (dated 16th June 2017) and now have TTL & HSS functionality with my XT-1 and SB900. Easy to update firmware too. Im amazed actually.

  • Wally Brooks

    The specs say ” Cactus V6 II does not transmit TTL information wirelessly” what are they refering to when they say wirelessly?

    • Leo @ Image Melbourne

      The old firmware doesn’t support wireless TTL. The new firmware will. I’m sure Cactus will update the manual to reflect the fact that TTL will be transmitted wirelessly in future.