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Fringer Contax 645-GFX Smart Adapter Upgraded


There is a welcome Firmware upgrade for the Fringer Contax 645-GFX Smart adapter.

In short: you don’t need the GF 63mm anymore for the activation. All lens model recognized. Correct aperture/focal length info. Full EXIF support.

Fringer worked on the upgrade based from feedback he got from our (wonderful and gigantic) Fujifilm GFX facebook group. And remember: if all you want are fast news and rumors about Fujifilm GFX, then make sure to follow the Fujifilm GFX facebook page.

You can get the latest firmware at fingeradapter here and purchase the adapter here.

Fujifilm GFX 50s: BHphoto, Adorama, AmazonUS

Full Press Release

Inspired by a demo video of some adapter prototype of others, I decided to dig deeper into Fujifilm’s G mount protocol. After a busy weekend’s hard working, I finally solved the puzzle. Version 2.0 of the firmware is highly recommended to current adapter owners.

You may get the latest firmware from and upgrade your adapter.

Or purchase a C645-GFX adapter with firmware 2.0 from

Ver2.0 is significantly improved in following aspects:

1. Recognize different lens models and display aperture correctly

All Contax 645 lenses are recognized correctly. You can control aperture through the ring on lens or the command dial on body. Displayed aperture will be exactly the correct value. Aperture value will be adjusted automatically if Mutar 1.4x applied.

2. No activation required anymore

You don’t need to own or borrow a GF63 to activate the adapter anymore. The adapter can be used directly on your GFX50s body with any Contax 645 lens.

3. Full EXIF support

All information recorded in EXIF of JPEG and RAW files is correct. Now you can recall all the exact settings of your camera when you review a photo taken by C645 lens, Fringer adapter and GFX camera.