Fringer’s Smart Adapter Contax 645 80/2 on Fujifilm GFX50s AutoFocus Demo :: Fujifilm X100F and X-T20 Reviews and More (miXed zone)

Fujifilm GFX

Fujifilm GFX 50s: BHphoto, Adorama, AmazonUS
Fujinon GF 110mm F2: USA: BHphoto, AmazonUS, Adorama Europe: WexUK, PCHstore
Fujinon GF 23mm F4USA BHphoto, AmazonUS, Adorama Europe: WexUK, PCHstore

Fujifilm X100F
BHphoto, Adorama, AmazonUS

  • The X100F — The Little Camera That Could! at fujifilm-x
  • Fuji X100F – A Street Photography Review at streetbounty

Fujifilm X-T20
BHphoto, Adorama, AmazonUS

Fujifilm X-T2
BHphoto / AmazonUS / Adorama

Fringer’s Contax 645 – GFX Smart Adapter Prototype is Finally Ready for Demo (Includes Demo Video)

Please ignore the white cable for debug purpose.
Please ignore the white cable for debug purpose.

Fringer’s Contax 645 – GFX smart adapter

Fringer’s Contax 645 – GFX smart adapter is finally ready for demo. You can see pictures of the prototpye as well videos and samples images below. (Arca quick release compatible) tripod mount included.

Additional information

GFX50s doesn’t support PDAF while Contax 645 lenses are designed for PDAF. Thus, it is extremely difficult to let those lenses AF fast and accurately on GFX50s. Two weeks ago I thought 140/2.8 would never AF properly on GFX50s. But finally I made it work just like the 45/2.8 and 35/3.5 do. However, their AF performance will never be comparable to native G mount lenses.

I have to emphasize AF is an experimental function of the adapter, on current stage at least. Don’t expect them perform like on a SLR. If AF performance can’t satisfy you, MF is always available. In the future, maybe a GFX body with PDAF support will come out and finally save us.

So far I only have one prototype in hand. In a month or so there will be a small batch of products ready for beta tests. Thus, don’t ask me where to buy it now.
Test shots

Following test shots were all taken by myself with AF on.”

Below you can see the prototype, the demo video as well as some sample images.

Check out the full blog post at the fringerdev website.

The Adapter on GFX

Sample Images

World’s First Fujifilm X – Contax N Smart Adapter with Autofocus & Electronic Aperture Control (Canon EF Possible in Future)

Fringer has developed world’s first Fujifilm X mount – [shoplink 52369 ebay]Contax N[/shoplink] electronic adapter. This adapter will give you autofocus and electronic aperture control. It’s a prototype for now, so it’s still under development, and the time to market is currently unknown. But in the video below, you can see how the Fujiflm X-E2 works fine with the [shoplink 52371 ebay]Carl Zeiss Planar 1.4/50[/shoplink].

The developer says that in the future, it may support other auto lenses such as Canon EF mount lenses.

Go to to see more details.

Contax N Glass:

  • Planar T* 1,4/50 mm
  • Planar T* 1,4/85 mm
  • Makro-Sonnar T* 2,8/100 mm
  • Tele-Apotessar T* 4,0/400 mm
  • Vario-Sonnar T* 2,8/17–35 mm
  • Vario-Sonnar T* 3,5–4,5/24–85 mm
  • Vario-Sonnar T* 3,5–5,6/28–80 mm
  • Vario-Sonnar T* 3,5–4,5/70–200 mm
  • Vario-Sonnar T* 4,0–5,6/70–300 mm