This 4-stop, 100 x 150mm X-PRO Square Reverse Graduated ND Filter with Frame from K&F Concept is made for the X-Pro Square Filter Holder System. This reverse graduated filter allows a selective area of density to be added to an image, making it an essential tool for enhancing landscape images. This filter's reversed soft edge tapers off to darken the selective area of the image by four stops, and it is well suited to darkening sunrises and sunsets for more saturated, impactful images.

Made of high-quality optical glass, this 100 x 150mm, 2mm thick filter features 28 layers of multicoating for optimal light transmission without adding any color cast. The coating also protects the filter from water, oil, minor scratches, and abrasions. It features a protective frame with large tabs that make it easy to install and remove from the X-Pro filter holder system.