Unleash the full potential of your Sigma 20mm f/1.4 DG HSM Art lens with the NiSi S6 Alpha 150mm Filter Holder Kit. Crafted for landscape photographers in pursuit of stunning images.The S6 Alpha filter holder kit comprises two key components: the main adapter ring, precision-engineered to snugly fit the Sigma 20mm f/1.4 DG HSM Art, and the 150mm wide square filter frame.Ghosting and flare, common challenges with ultra-wide lenses, are masterfully tackled by the S6's main adapter. It employs the same matting treatment as premium lens hoods to guarantee impeccable image quality. Installing the main adapter is effortless - simply slide it over the lens, with the silver ring end leading, and twist the silver ring for a secure fit. A locking screw on the silver ring provides added security to keep the holder firmly in place. Say goodbye to vignetting worries as the S6 assures unobstructed images. The main ring is equipped to accommodate a dedicated circular rotating filter, tailored exclusively for the S6. This design facilitates CPL rotation while utilizing 150mm filters, thanks to two gears on the rear of the main adapter ring. Explore endless possibilities with various circular filters for the S6, available separately, allowing for a wide array of filter combinations.The square filter frame is designed to hold two 150x150mm or 150x170mm filters, of 2mm thickness. The front of the holder features convenient clips for the rapid removal of 150mm filters, facilitating easy focus adjustments, replacements, or removal. For creative control using Graduated ND filters, the filter holder frame offers 360-degree rotation for adjusting the horizon, with a locking pin bolt to secure the desired position.The S6 Alpha kit includes a custom case for convenient storage and transportation, ensuring your gear is protected and readily accessible. Elevate your camera photography to new heights with the NiSi S6 Alpha 150mm Filter Holder Kit.