The NL Pure also employs extra-low dispersion (HD) glass elements and a range of proprietary optical coatings that, when combined with its other performance features, creates a set of glasses that delivers impressive image quality and durability. In keeping with its tradition of high-performance optics, Swarovski uses highly reflective roof prisms and fully multicoated fluorite-containing HD glass lenses to deliver superior image quality. A field-flattener lens system complements the glass and coatings to keep the edges of the view crisp and sharp. The resulting views are rich with detail and saturated with lifelike color with exceptional contrast and resolution.