Filtrocam Napoli 100mm Magnetic Filter Holder Kit

Napoli is the compact entry into Filtrocam's Collezione Campania, built on the same 1.1mm slim glass as the larger kits. Thickness is the whole argument: on a wide lens it is the stack of glass in front of the element that puts dark corners in the frame, so the filters and the holder are cut thin enough to stay out of the field. The 90mm circular polarizer is sized to the same brief, chosen specifically to avoid vignetting on a wide-angle lens.

The holder uses a modular slot system that takes up to three 100mm filters, and two pairs of screw-in guide blocks let you reconfigure it for 1.1mm glass or for 2mm glass. Screw an adapter ring onto the lens, lock the holder on, and it rotates a full 360 degrees for positioning a graduated filter against a horizon. The polarizer sits magnetically inside the holder assembly and has a geared ring driven by an external dial, so you can dial polarization independently of where the grads are sitting. The kit ships with an ND64, a soft GND0.9 and a reverse GND0.9, plus 67, 72, 77 and 82mm adapters.