Nikon Z 9 Reference Manual page 722

D
Caution: Image Sensor Cleaning
Dust off reference data recorded before image sensor cleaning is performed
cannot be used with photographs taken after image sensor cleaning is
performed. Select [Clean sensor and then start] only if the Image Dust Off
reference data will not be used with existing photographs.
D
Cautions: Acquiring Image Dust Off Reference Data
•
An FX-format lens with a focal length of at least 50 mm is recommended.
•
When using a zoom lens, zoom all the way in.
•
The same reference data can be used for photographs taken with different
lenses or at different apertures.
•
Reference images cannot be viewed using computer imaging software.
•
A grid pattern is displayed when reference
images are viewed on the camera.
B The Setup Menu: Camera Setup
722