Astromania Stereo Bino Viewer with Plossl 32mm Designed to fit into a standard 1.25" eyepiece tube. This binocular attachment features high quality BAK-4 prisms for clearer, sharper images. An excellent accessory which helps to reduce eyestrain. Eyepiece diopter scales for sharp focus. 1.85x and 3x specially-designed Barlow Lens is included which effectively doubles the magnification of eyepieces used. With two 32mm Plossl Eyepicecs which give the widest viewing field along with extra sharpness and long eye relief.