• Contax 645 - GFX Smart Adapter

    World's first smart adapter for Fujifilm GFX cameras

  • Contax 645-GFX smart adapter

    Key features

    Electronic aperture control

    Using aperture ring of the lens or command dial on the body to control the aperture.

    Auto focus

    Except the MF lens 120/4, all Contax 645 lenses as well as the Mutar 1.4x are suppored to AF on GFX50s.

    In any cases that you don't want AF, MF is also available.

    Correctly record EXIF information

    Lens model

    Max/current aperture

    Focal length


    Compatible with all Contax 645 lenses

    Including 35/3.5, 45/2.8, 55/3.5, 80/2, 120/4, 140/2.8, 210/4, 350/4, 45-90/4.5 and Mutar 1.4x

    Well designed and made

    Designed for 44 x 33 frame. Unlike 135 lenses, no vignetting issues!

    Built-in tripod mount without additional cost. (Read this please)

    Flocking inside minimized the internal reflection.

    Full metal body, copper (front & back) mount, durable design

    Field upgradable (through built-in micro USB port).

  • Service and resources for C645-GFX adapter

    After-sale services

    14-days return or replacement

    Within two weeks after you purchased the adapter, if it works abnormal or not as described, you may return it to us and get refund* or a new replacement. Please contact us before return it.

     1-year free warranty.

    Within one year after you purchased the adapter, if you encounter any problem, you may send it back to us for repair. If it's not caused by abnormal usage, we'll repair it for free.

    Lifetime service.

    You can always rely on our after sale service, even after the free warranty period. But you may need to pay for relevant costs.


    * PayPal fee will not be refunded. Check this for more details.

    Firmware update

    Version 2.3 (2017/10/30)

    Release notes 


    User's manual

  • Contax 645 lenses compatible list

    The C645-GFX adapter is compatible with all C645 lenses.


    Lenses with better AF performance

    Distagon T* 3,5/35
    Distagon T* 2,8/45
    Distagon T* 3,5/55
    Planar T* 2/80
    Sonnar T* 2,8/140
    Sonnar T* 4/210
    Tele-Apotessar T* 4/350
    Vario-Sonnar T* 4,5/45-90


    Lenses with degraded AF performance

    Sonnar T* 2,8/140 + Mutar 1,4x T*
    Sonnar T* 4/210 + Mutar 1,4x T*
    Tele-Apotessar T* 4/350 + Mutar 1,4x T*

    MF only

    MF only lens

    Apo-Makro-Planar T* 4/120

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