This Dandy Gadget: Coloring by green, the Nikon Ecobins Binoculars is displayed to you that the device is the eco one. Featuring Eco-Glass that lead and arsenic-free lenses and prisms which is using non-chloride rubber and no harmful inks or dyes during production, this one is really eco. But not only eco that the outpoint of this device, the Ecobins Binoculars also contains spherical eyepiece lenses that provide distortion-free viewing, internal blackening to minimize light loss inside binocular tubes and multi-coated lenses that offer maximum brightness, contrast and true color.