2
huge system and there are so many different lens models. A lot of them have not been tested and
optimized, yet. Most of them would work on the adapter with a lower performance. And a small
amount of them may not be compatible. If you encounter poor AF performance or compatibility issues,
please wait for us to test and optimize that lens and support it in future firmware updates.
When using zoom lenses with variable maximum aperture that haven’t been tested and optimized,
the aperture value displayed may not be correct.
See the attached list at the end for tested and optimized lens models.
3.
Function descriptions
3.1 Lens self
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test (for lenses NOT tested and optimized only)
When you install a lens not tested/optimized on the adapter and power on the camera for the first
time, the adapter may drive the AF module to the close end and then to infinity. After that, the camera
will reboot to finish the self
-
test and calibration process. During the process, please do not touch the
focus ring of the lens, or you may interfere with the calibration. If there is something wrong with the
self
-
test procedure, the AF function may not be in a normal state. If that happens, turning on and then
turning off the camera at once will clear the calibration data stored. Installing another lens and
powering on the camera will do the same.
Tested and optimized lenses don’t do this.
3.2 Full frame or medium format selection (35mm mode on/off)
EF mount lenses are designed for full frame cameras. Its image circle covers a 36mm x 24mm
sensor. But the dimension of the sensor of GFX cameras is about 44mm x 33mm. Thus, many EF lenses
can’t fully cover it at all and may cause dark corners/vignetting and distortion, etc. It’s normal and not
the malfunction of the adapter.
By default, the camera menu item “35mm mode” is set to “auto”. Images will be cropped to
36x24mm automatically when an adapter and an EF lens are attached. (Be noted, it won’t do that auto
crop if focus bracketing support is enabled in SETTINGS.INI on the adapter. Check section 3.6.1 for
more details.) Thus, usually you won’t see the issues mentioned above. But, since some of the EF
lenses do cover the medium format sensor, you may force the camera to capture 44x33mm images by
setting “35mm mode” to “off” on camera menu.
3.3 Setting aperture and shutter speed value
Setting aperture value through electronic aperture ring:
Looking down to the top of the camera, turning the ring right tells the camera to stopping down,
and vice versa. Each step equals to 1/3 EV. When it is turned to the smallest aperture position, one
