The NiSi 100mm Filter Holder for Olympus M.Zuiko 7-14mm f/2.8 PRO lens enables the use of up to two 100mm wide, 2mm thick filters on the Olympus M.Zuiko 7-14mm f/2.8 PRO. It is compatible with both the 100x100mm or 100x150mm filters from NiSi as well as other brands including LEE, Sing-Ray, and Cokin. It features left to right pressed clips and is very smooth to insert and remove filters. This dedicated holder has no vignetting at 7mm with the holder in the upright position (or 90°) but does present some vignetting with the holder at not in the upright position (or 45°). This filter holder kit consists of a black powder-coated Aviation-grade billet aluminium front filter holder and a filter holder adapter ring. By first mounting the adapter ring to the lens, the filter holder can be mounted very quickly to the lens via the adapter ring. A silver lock knob ensures the adapter ring is firmly attached to the lens while the filter holders pull-and-release locking lever aids in providing a reliable connection that permits the holder to be rotated 360° for when using with graduated neutral densitiy and other filters. In addition, the filter holder features a lock to so you can choose to keep the holder in position or be unlocked to allow the 360° rotation.