fringer C645-GFX II Smart Camera Adaptor User Manual

C645-GFX II Smart Camera Adaptor
User Manual

Introduction

This product supports C645 mount lenses working on Fujifilm Mount cameras with electronic aperture control, auto focus and EXIF recording. Latest firmware and user’s manual can be downloaded from: https://www.fringeradapter.com/contax-645-to-fujifilm-gfx#3 (en) or https://fringeradapter.mysxl.cn/#service-c645-gfx (cn)

Compatibility

Camera compatibility: This product supports all G mount cameras in the market.

1. Cameras with PDAF (e.g., GFX100 and GFX100S): PDAF works. AF speed and accuracy is relatively better.
2. Cameras without PDAF (e.g., GFX50S, GFX50R and GFX50S II): Contrast AF only. AF performance is poorer and more error prone. Lens compatibility: This product supports all C645 lenses. All of them except Apo-Makro-Planar T* 4/120 support auto focus. All of them support IBIS when working on cameras with IBIS function, e.g., GFX100, GFX100S and GFX 50S II).

Settings
Lens installation: Align the red dots on both mounts of the lens and the adapter. Then insert the lens and turn it until the focus indication white line on the lens is exactly at the top direction and the lens release button on the adapter pops up.
Full frame/Medium format selection: Please make sure the 35mm mode is set to Off in the camera menu. If it’s set to On or Auto, the pictures may be cropped which isn’t necessary since we are using medium format lenses.

AF/MF selection: C645 lenses don’t have AF/MF switches. We use their aperture ring instead. When it’s turned to the minimum stop, i.e., maximum F number, the adapter informs the camera to enter MF mode. Otherwise, it’s in AF mode. The AF/MF switch on the camera can always be set to AF.
Adapter configuration file: Connect the adapter to a computer using the cable included. You will see a drive named FRINGER. There is a file named SETTINGS.INI in the root folder. It’s in standard INI file format. Don’t modify it unless you understand how to do so. If you want to restore its content to default, just remove it. The adapter will regenerate a default version next time when the adapter is used on a camera. Aperture setting:
Aperture may be set through the aperture ring on the lens. But if it’s in MF mode, the aperture ring is set to the minimum stop. In that case aperture can be set through command dial on the camera. Meanwhile, if you set the value of “Lens Aperture Ring=” in SETTINGS.INI to 0 (the default value is 1), aperture is always set through  command dial on the camera.
Shutter speed setting: Manually setting shutter speed is suggested! Setting shutter speed to auto in AF modes may cause the aperture blades move frequently with noise and flashing of LCD or EVF when environment brightness changes. That may interfere with view finding. Be noted, when preview EXP./WB in manual mode in camera menu is set to Off, you need to use MF mode to avoid the issue.
AF settings: Because of the limitation of the old lenses’ design, AF-S is suggested. On cameras with PDAF support, e.g., GFX100 and GFX100S, AF-C may work, too. But don’t expect good performance. On other cameras, please don’t use AF-C mode. In both cases, Face/Eye AF is supported. To get a balanced AF performance in terms of success rate and accuracy, setting focus points to medium size is suggested. Before releasing the shutter, you may focus multiple times on the same object to improve accuracy. Meanwhile, please avoid using focus points in columns close to the left and right edge.
Image stabilization settings: To use IBIS on cameras like GFX100, GFX100S and GFX50S II, make sure the value of “Focus Bracketing=” in  SETTINGS.INI is set to 0 (the default value). Don’t forget to turn on IS in camera menu.
Focus bracketing settings: To use focus bracketing, please set the value of “FocusBracketing=” in SETTINGS.INI to 1 (the default value is 0). Be noted that please always use AF to set the working range and start position. If you manually turn focus ring of the lens, focus bracketing function won’t work properly.

Firmware update

You need a PC or MAC and a USB Micro B cable (already included) to upgrade the adapter.

1. Get the adapter off the camera. Connect it to your computer.
2. Find a new drive named “FRINGER” and copy the new firmware to it.
3. Wait for about 20 seconds. The adapter will disconnect itself and reconnect automatically.
4. Check the installed firmware version (VERSION.TXT on the adapter) For example:

Before:
FBL: C6G2 1.4
Fringe adapter product: C645-GFX II
Version: 0.70
Internal Version: 22.2.3.1
after:
FBL: C6G2 1.4
Fringe adapter product: C645-GFX II
Version: 1.0
Internal Version: 22.2.27.1
Be noted: If nothing happens when the adapter is connected to the computer, it’s probably caused by a bad USB cable. Please try another one.
Warranty service
We provide 1-year limited warranty. You may contact the seller from whom you ordered the adapter to get warranty service. If the issue was caused by abnormal usage or it’s out of the free warranty period, there is a paid repair service. In any case, you may contact us for the service: fringeradapter@163.com
Manufacturer information
Dongguan Jingo Precision Components Co., Ltd., Guangdong, China

References

• Fringer smart adapters for Contax, Sony and Fujifilm | 上线了sxl.cn
• Contax 645 to Fujifilm GFX - Fringer smart adapters

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