such as flashing screen.
When you install a lens that is not on the tested and optimized lens list and power on the camera
for the first time, the adapter may drive lens’ AF module to the close end and then to infinity to do a
self-test and calibration. During this procedure, please do not touch the MF 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 defective calibration data. Installing another lens and power on the camera will do
the same. There isn’t such procedure for any tested and optimized lenses.
3.2 Setting aperture and shutter speed value
Like Fujifilm XC lenses, there is no aperture ring on the adapter. You may use camera’s command
dial to set aperture value. Please refer to the camera’s manual for more details.
For Nikon AF-D lenses, please set aperture ring on the lens to the minimum position (maximum F
number). Or the lever inside the lens may interfere with that of the adapter when controlling
diaphragm.
You may set shutter speed through the command dials on camera. During view finding, when
environment brightness changes, the lens aperture blades may move frequently with a minor noise
and brightness change of LCD or EVF. It only occurs when both AF and aperture priority are enabled.
That’s a unique behavior of the Fujifilm mirrorless. Native XF lenses behave the same. But their
aperture motor moves so fast and silently that you will never notice. However, SLR lenses’ aperture
moves slower and noisier. If you want to avoid it, manually set the shutter speed. Of course, you may
still set shutter speed to auto if that’s tolerable. Be noted that if “PREVIEW EXP./WB IN MANUAL
MODE” in the camera menu is set to “OFF”, the described issue may occur even the shutter
speed is set manually.
Regarding D/G lenses from Nikon and other non-electromagnetic auto lenses from third parties,
there is a mechanical coupling between the lens and the adapter which may bring aperture control
tolerance inevitably. When the camera is metering, if the shutter speed is set to auto, e.g., aperture
priority mode, it may use a different aperture from your setting. That may cause metering tolerance.
To avoid it, you need to set the shutter speed manually so that the camera will use the same aperture
setting when metering.
3.3 Setting AF modes
For a better AF performance, please always use phase detection focus points. See the dashed box
in the following charts (X-Trans II and III only). For cameras equipped with X-Trans III CMOS, e.g. X-H1,
X-Pro2, X-T2, X-T20 and X-E3, use central 7 x 7 among all 91 AF points. For cameras equipped with
