Tele Vue 2" Everbrite Diagonal with SCT Adapter and 2" to 1.25" AdapterDescription 90 Everbrite Diagonals Whiter and brighter images. Simply put, that is the benefit the Everbrite mirror coating. This exotic, dielectric, nonmetallic coating is 99% reflective across the full visual spectrum, resulting in the "whitest," most natural image available. The coating is painstakingly applied to Pyrex with a surface accuracy of a 1 10 wave flatness. To ensure performance, every mirror is optically inspected under conditions far