Luminous transmittance angle dependence refers to the clarity of your filter when looking at an angle. Welding helmets in Angle Dependence Class 2 category maintain a fairly consistent shade, though the image might become a bit distorted when looking down, up, or to the side. If you have any questions or need a product recommendation, do not hesitate to contact our customer support team on 020 7501 0594 or via our Contact Us page.