Hand-ground, bright matte surface. Remains quite bright even at f/8. Made from clarified glass for increased sharpness. Ground glass size: 4"x5"x0.07" (102x127x1.8mm). Focusing screen size: 3.9"x4.9"x0.08" (101x127x2.0mm) with grid. Constructed from optical glass, frosted and hardened for durability. Ultra-thin design with high permeability. Provides clear image with high contrast, making focusing easier and brighter than standard ground glass. Features 45-degree clipped corners. Matte ground surface is on one side, while the other side is smooth optical glass. Smooth edges prevent accidental cuts. Install the matte side facing inward toward the lens to protect the surface and avoid focus shift when using a film holder. Compatible with universal 4x5 large format cameras, including models from Linhof, Wista, Toyo, Sinar, Chamonix, Horseman, Sheng Hao, and Tachihara. Package includes: 1x Ground Glass