How do you fix / fine-tune the focus on a zoom lens? Nikon states
The D850 can fine-tune autofocus automatically. The results can be used with all lenses of the same type.
But does it also mean that fine-tuning one zoom lens in one specific focal length and aperture will fix focus problems for all focal lengths and apertures? (ie. calibrating a 16-35mm at f4 16mm will also provide proper calibration at 35mm f9?)
What about distance to the calibration target? Does it play any influence if you calibrate at a particular distance but then shoot your subjects at another?