Introduction: This low-power Omni eyepiece is a 4-element high-quality symmetrical Plossl optical design. Its functions include: the blackened edge of the lens can minimize internal reflection and maximize contrast; the multilayer coating group on the surface of each lens can maximize the transmittance and contrast; each Omni passes through two Step anodizing process to prevent reflection from the top eyepiece tube, most other manufacturers use reflective surfaces. The threaded lens barrel accepts a 1-1/4" screw-in filter. feature: Eyepiece Series Omni Focal length 32mm Barrel size 1.25 inches (31.7 mm) Field of view (specified manufacturing) 52° Filter thread standard 1.25 inch filter thread (M28.5 x 0.6) Eye relief 22 mm (0.87 inch) Multi-layer coating Lens element Lens group The edge of the shading lens is Bucket with safety undercut Rubber goggles are Package Included: 1 * Celestron 1.25 inch Omni Plossl eyepiece Introduction: This low-power Omni eyepiece is a 4-element high-quality symmetrical Plossl optical design. Its functions include: the blackened edge of the lens can minimize internal reflection and maximize contrast; the multilayer coating group on the surface of each lens can maximize the transmittance and contrast; each Omni passes through two Step anodizing process to prevent reflection from the top eyepiece tube, most other manufacturers use reflective surfaces. The threaded lens barrel accepts a 1-1/4" screw-in filter. Feature: Eyepiece Series Omni Focal length 32mm