HSS mode disappears from Canon 550EX

Hi, everybody! HSS mode disappears from Canon 550EX speedlight, when I attach it to V6 and turn Cactus on. Any idea or solution?


  • I believe that's normal as the V6 does not attempt to emulate an E-TTL camera and the Canon 550EX relies on communication with an E-TTL camera to provide HSS mode.

    To use HSS with a V6 off-camera, you need a flash that supports engaging HSS manually, like the RF60.

    If you are talking about TTL pass-through with the Canon 550EX being mounted on an on-camera V6 then HSS should be available provided you chose the correct flash profile.
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