Designed for lenses and adapters with a 105mm standard filter thread. Confirm your filter size by locating the "ø" symbol on the lens or lens cap for hassle-free compatibility. This filter has a front and back thread, meaning it can be left on a lens at all times for protection, while still allowing the use of other filters and accessories to thread over top. 99.9% Transmission Clarity – Achieves an incredible 99.9% peak transmission rate with ULRC coating, making it as clear as air. Perfectly compatible with premium lenses for optimal image quality. Blocks UV Light Below 395nm – Reduces blue haze and UV-induced interference, ensuring vibrant colors and sharper images even in challenging lighting conditions. Ultra-Thin Brass Frame – Durable brass frame with a slim design to prevent vignetting on ultra-wide angle lenses. Knurling ensures easy installation and removal. Advanced 48-Layer ULRC Coating – Features 48-layer nano-coating for scratch, stain, water, and oil resistance, delivering durability and reliable performance in harsh environments.