This page collects examples at very low shutter speeds, as low as 1/3 second, all shot handheld with IBIS with 3 different lenses. Most were a success the first (and only) try, though some took more than one try—a mix of astounding (4 successes at 1/4 sec) and disappointing (5 failures at 1/3 second). Notes are included.
The idea is showing that using optimal handheld technique along with IBIS greatly expands the shooting envelope and given the dearth of native lenses, using the Nikon FTZ lens adapter is going to be common, particularly (for me at least) with Zeiss DSLR lenses.
Impressive results. Includes images up to full camera resolution along with shooting notes.