Yes, it features a dust and moisture-resistant design with rubber gaskets at the mount and critical seams for professional use in challenging environments.
No, it does not have built-in Optical SteadyShot. It relies on the In-Body Image Stabilization (IBIS) found in most Sony Alpha camera bodies.
The lens uses a standard 67mm front filter thread, making it compatible with a wide range of ND and circular polarizer filters.
Excellent. It features a de-clickable aperture ring for silent iris control and XD Linear Motors for near-silent, smooth autofocus during filming.