Yes, it features a weather-resistant (WR) design with seals in 14 locations, making it resistant to dust, moisture, and temperatures as low as -10°C.
No, this lens does not have built-in Optical Image Stabilization (OIS). It is best paired with Fujifilm camera bodies that feature In-Body Image Stabilization (IBIS) like the X-T5 or X-H2.
The lens has a 77mm front filter thread, which is a standard size for professional filters like NDs or circular polarizers.