The Formatt Hitech BF4X5SEND6HD4 is a high-definition, resin-based graduated neutral density (GND) filter engineered for professional photography and cinematography. Specifically, it is a 0.6 density (2-stop) soft-edge graduated neutral density filter, meaning it transitions smoothly from a darkened top section to a clear bottom. This design allows photographers and cinematographers to balance exposure disparities within a single frame, most commonly by darkening an overly bright sky while preserving detail in a darker foreground, thereby achieving a more evenly exposed and visually compelling image. The filter is constructed from Formatt Hitech's high-definition resin material, which is optically clear and color-neutral, ensuring minimal color cast and no loss of sharpness when placed in front of a lens.

The filter's dimensions, 4x5 inches, are part of the standard format for use with modular filter holder systems like those from Lee, Cokin, and Formatt Hitech's own Eclipse series. The "soft-edge" designation refers to the gentle, gradual transition zone between the dark and clear sections, which is ideal for scenes where the horizon line is irregular—such as mountains, trees, or buildings—as it helps conceal the filter's effect for a natural look. The ND0.6 density provides a precise two-stop reduction in light transmission, offering significant control without being overly aggressive, making it one of the most frequently used strengths in a GND kit. The filter is also treated with multi-coatings to resist water, oil, and dust, simplifying cleaning and maintenance in field conditions.

Designed for durability and optical performance, this filter is a critical tool for landscape, architectural, and environmental portrait photographers, as well as videographers working in high-contrast lighting. By enabling correct exposure in-camera, it reduces the need for extensive post-processing blends or HDR techniques, preserving image quality and workflow efficiency. The Formatt Hitech brand is recognized for its color accuracy and consistency, which is essential for professionals who require reliable, repeatable results. This specific filter represents a foundational element of exposure control, allowing creative professionals to capture scenes as they are perceived by the human eye, even under challenging light.