This NiSi S5 150mm Filter Holder Kit is designed for use with a Sigma 14mm f/1.8 DG HSM Art lens. It allows for the convenient use of up to two separately available, 150mm wide, 2mm thick filters along with an included circular polarizer without vignetting. This kit features an aluminum alloy filter holder that is pre-installed with two pairs of plastic filter slots, a configuration that accommodates two rectangular filters. Each slot is designed to grip an installed filter only along the surface of the filter's edges. Contact with a filter's front or rear-facing surfaces is avoided, particularly when using graduated filters whose effect can be adjusted to better suit changing lighting conditions or creative demands by sliding them up or down within a filter slot.

Use of this NiSi S5 150mm Filter Holder Kit is easily accomplished by first sliding the kit's adapter ring over the integrated hood of a Sigma 14mm f/1.8 DG HSM Art lens. While its screw-in locking pin helps to provide a reliable connection to the lens, the adapter ring accommodates the included NiSi Circular Polarizer Filter for NiSi S5 150mm Filter Holder Kits. When combined with the adapter ring, the polarizer filter can be rotated to adjust its effect. In such instances, both external dials on the adapter ring allow for the independent rotation of the circular polarizer.

The kit's filter holder can then be placed over the adapter ring. After being fitted onto the adapter ring, the filter holder's pull-and-release locking pin helps to provide a reliable, yet adjustable connection while the entire filter holder kit can be rotated 360°, permitting the use of graduated neutral density and other filters that are enhanced by varied positioning.