Under the umbrella of B+W's esteemed product line, the 39mm Basic 486M Mrc Uv/Ir Cut Filter stands as a high-quality, durable, and reliable tool for photographers. This versatile filter is specifically engineered to combat unwanted Uv and infrared components that can compromise the clarity and color accuracy of your images. Unlike conventional filters, the B+W 486 Uv-/Ir-Cut filter employs a unique interference method, utilizing a series of wafer-thin, partially reflecting layers with a meticulously calculated thickness. This innovative design ensures a sharp cut-off absorption, effectively preventing color casts and blurring that can occur in digital cameras where the Ir barrier in front of the image sensor displays some residual transmittance.The B+W 486 Uv-/Ir-Cut filter is clear and colorless, ensuring no additional exposure is required during use. Its design allows it to be left on the lens permanently, serving as an effective protection filter.