HD Coating is a new-generation, multi-layer lens-coating technology, developed to provide better-quality optical characteristics in a greater number of lens products. It was designed to satisfy the demand for higher lens performance that is required due to advances in digital cameras.
With the application of a state-of-the-art multi-coating process completely different from the conventional one, HD Coating provides a coating layer thickness and anti-reflection performance that is close to theoretical design specifications. A lens surface treated with HD Coating assures reflectance that is less than 50% that of conventional multi-layer coatings.
The graphs above show the optical performance of samples selected from each category, after treatment with 10 layer-forming processes. As you can see, HD Coating samples show extremely high layer-forming precision and extremely low discrepancy in reflectance. Since reflectance curves are almost identical at different wavelengths, the HD Coating graph demonstrates optical characteristics which deliver ideal color balance.