Why Lens Coatings Are So Important in Photography

In recent years, some lens designers have updated their lenses with new lens coatings. For instance, Pentax’s newest limited lenses feature an existing optical design...
In recent years, some lens designers have updated their lenses with new lens coatings. For instance, Pentax’s newest limited lenses feature an existing optical design with only a few improvements, including a better lens coating. When testing such lenses, reviewers generally agree that new lens coatings significantly improve the image quality (especially contrast and flare), but never quite explain how lens coatings work. That is the aim of this article. A collection of lenses with anti-reflection coatings. Photo by Mengliu Di.The Origins of Lens Coatings Historically, coatings have been introduced to reduce light loss in optical systems. Indeed, each time...