The K&F CONCEPT 100X150mm Square Soft GND8 is a graduated neutral density filter designed for landscape photography to balance exposure between bright skies and darker foregrounds. Key Features: GND8 (3-stop) gradual reduction: Smoothly transitions from dark to clear, perfect for sunrise/sunset shots Japanese AGC optical glass: Premium material for enhanced clarity and color accuracy 28 multi-layer nano coatings: Waterproof, scratch-resistant, and anti-reflective 100x150mm square format: Compatible with Lee and Cokin Z-series filter holders Soft transition: Gradual blend works well when the horizon isn't perfectly straight Best for: Landscape photographers wanting to capture detail in both bright skies and darker foregrounds without multiple exposures.