Hähnel Viper TTL Transmitter - Canon

Additional Viper TTL Transmitter


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  • Control up to three groups of flash guns, each group comprising of multiple flash units
  • TTL, Manual and Multi (Stroboscopic) mode
  • Digital Channel Matching provides reliable connections
  • Easily adjust mode & values on a group by group
  • LCD Display indicates zones A, B & C on/off & flash power output
  • Compatible with original speedlights & MODUS 600RT
  • Use with the MODUS 600RT Speedlight for off-camera flash
  • microUSB socket for firmware upgrade


  • Download and save the zip file below for the VIPER TTL
    Note that the firmware installation and upgrade can only be done using a Windows PC or laptop
    Apple IOS not compatible
  • Select the correct language (EN, FR or DE)
  • Follow the detailed instructions which are included in the contents of the zip file below
  • Any problems, contact info@hahnel.ie

Corrects an intermittent white balance problem when used with the Canon 5DMk3
Corrects an intermittent over exposure problem when used with the Canon 700D 

New compatibility with Canon 6DMkII / 77D / 800D / M3 / M5 / M6
Addition control of Multi mode from the camera menu (in previous versions, when the Viper TTL was in Multi mode, the flash control options on the camera menu did not show Multi mode and the operating parameters could not be changed.  In V23, when the Viper TTL is in Multi mode, the camera menu does show Multi mode and it is possible to change Times / Hz / Power from the camera menu also.