Hähnel Viper TTL Transmitter - Nikon

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 issue with flash intermittently firing out of sync below 1/250