IBIS with non-CPU lenses works if you type in the focal length and maximum aperture into the list of non-CPU lenses that you use. This includes mechanical-only lenses that don't have electrical contacts.   https://onlinemanual.nikonimglib.com/z8/en/sum_non-cpu_lens_data_guid-fac0444d-3965-c25a-4c18-84574cb10167_285.html   After typing in the data for the non-CPU lenses, you can then select from the list the actual one that you are using and the data is recalled. This can be p