Contax 645

Please add support for Contax 645


  • Hello @takingpics

    Thank you for your message.

    The V6 II will work on a Contax 645 supporting remote control of flash power output and zoom level of a V6 II compatible TTL flash or the Cactus RF60X.

    But for full support of HSS / TTL we will definitely need to investigate if it is possible. But first we must ask - what is the demand from Contax camera users? 

    We will consider after releasing our remaining X-TTL firmware versions, Nikon and Canon. 

    FYI this is the first time a Contax user contacted us.  If we do expand V6 II's camera compatibility, we would first consider Leica and Hasselblad before Contax. If you have any data from photography groups do share with us.

    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", "NIK.A.001", "v.103", or "A06".

    TTL or HSS not working on Cactus V6 II and V6 IIs? Be sure to check hot shoe connectivity by doing the <CAMERA INFO> check.

    Feel free to suggest an improvement or share product ideas. Contact us directly at  At Cactus, we listen. 
  • Contax 645 is also a favorite camera of wedding photographers. I really love this camera. Here are my photos from it please make hss support!
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