K&F Concept 67mm Lens Protection Filter, AGC Optical Glass, HD Ultra-Resolution, High Transmittance, Low Reflectance, Ultra-Thin, 28-Layer Nano Coating, Water-Repellent and Anti-Stain, Scratch-Resistant, UV Absorption Lens Protection MCUV Filter (NANO-X Series) I purchased this, but I am selling it because it caused vignetting when I stacked filters on a wide-angle lens. It has only been used for a test fitting. 【Low Reflectance, High Transmittance, High Resolution】This filter uses optical glass and is an MC lens guard that does not affect the color characteristics of the lens, and an MCUV type filter that cuts UV (ultraviolet) light. MC stands for multi-coating, which deposits an anti-reflection film on the lens surface to suppress unwanted reflected light. Because it has 28 layers of coating, it boasts a high transmittance of 99.6%. The filter frame is made of aluminum alloy, is lightweight, and has a thin frame, so there is little worry of vignetting, making it the perfect lens filter for wide-angle lenses. This is a professional-grade, high-precision lens protection filter. 【Water-Repellent and Anti-Stain】Water-repellent (WPC) processing, a water-repellent lens filter, easily removes water droplets with a light wipe. It is resistant to fingerprints and can be easily wiped clean even if it gets dirty. This is a protective filter that firmly protects your valuable lens. 【Convenient Protector】It can be used with single-lens reflex cameras, digital cameras, film cameras, etc., and can be attached at all times, allowing for lens cap attachment.