Yes, the lens is extensively sealed to prevent dust and moisture from entering the barrel, making it reliable for professional outdoor use.
No, this lens does not have built-in optical VR. It relies on the highly effective In-Body Image Stabilization (IBIS) found in Nikon's full-frame Z-series cameras.
The lens uses a standard 77mm front filter thread, which is compatible with most professional-grade circular polarizers and ND filters.