Specifications Focal Length: 0.91 inch / 23 mm Field of View: 62° Standard Diameter 1.25 inch (31.75 mm) Mounting Diameter Eye Lens Diameter: 0.87 inch / 22 mm Coating: Optical Lens, Full Coating, High Definition Optical Construction: Aspherical Eyepiece Weight: 1.69 oz / 0.11 lbs / 48 grams Package Inclusion 1 x SVBON3 mm aspherical eye Pieces