• Welcome!

    Hi! I'm Fringer who developed Contax N/645 - Sony E smart adapters.

  • Features

    Fully utilize your beautiful Zeiss lens on latest digital camera bodies, just like a native one.


    Phase detection auto focus is supported*. AF performance is close to SLRs.

    *Only supported on A7II/A7rII/A6300/A6500

    Electronic aperture control

    Fringer adapter fully understands Contax N and Sony E mount protocols and control lens' built-in aperture blades smoothly.

    Lens info (Exif)


    - Lens model, focal length, aperture, etc.

    reported in realtime.

    - Automatically supports 5-Axis SteadyShot (IBIS) !


    Field upgradeable

    Built-in USB port



  • Compatible list

    Lens and Cameras

    Contax N lens supported

    - Makro-Sonnar T* 2.8/100

    - Planar T* 1.4/50

    - Planar T* 1.4/85

    - Tele-Apotessar T* 4/400

    - Vario-Sonnar T* 2.8/17-35

    - Vario-Sonnar T* 3.5-4.5/24-85

    - Vario-Sonnar T* 3.5-4.5/70-200

    - Vario-Sonnar T* 3.5-5.6/28-80

    - Vario-Sonnar T* 4.0-5.6/70-300

    Contax 645 lens supported

    - Apo-Makro-Planar T* 4/120

    - Distagon T* 2,8/45

    - Distagon T* 3,5/35

    - 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

    - 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*

    Camera bodies supported


    PDAF supported

    - A7II, A7rII, A6300 and A6500


    Contrast AF only

    - other E mount bodies, like Nex6, Nex7, A6000, A7, A7r, A7s, A7sII, etc.


    AF not available

    - old bodies like Nex5, Nex3 and NexC3.

  • Buy it now!

    Find out which one you need!

  • Services and Firmware

    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 me and get full refund or a new replacement. Please contact me before you return it to me.

     1-year warranty.

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

    Lifetime service.

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

    Firmware update

    So far, the latest firmware version is v.31 which is shipped with your adapter. In the future, if Sony make any significant upgrade to their E mount bodies (just like the new PDAF capabilities introduced by A7rII), I'll modify the firmware to support those new features if necessary.

    You may find download link here when new firmware come out.

  • Any questions?

    Contact us

  • More information

    For your reference.

    The development info, users' feedbacks, etc. (Chinese only)

    Fringer Contax N/645 adapter Mk3 Users Manual

    Fringer Contax 645 adapter Users Manual