Item Type: Telescope Lens_x000D_ Product Material: Metal and optical glass_x000D_ Weight: Approx. 63g / 0.14lb_x000D_ Focal Length: Approx.23 mm/0.91in_x000D_ Interface Size: Approx.24.5mm/0.965in_x000D_ Lens Coating: Green FMC 1Good Performance: Multi layer high definition optical glass lens with green film has chroma correction, providing high permeability to ensure to see clear scenery. 2Superior Texture: The astronomical eyepiece constructed from optical and fully coated glass, and excellent image contrast and transmittance; which has high brightness. 323mm Focal: The large 23mm astronomical eyepiece focal length won't strain your eyes when stared long. Extensive view to keep your eyes comfortable. 4Applicable Scenarios: Astronomical telescope eyepiece is very suitable for astronomical observation of nebulae; Suitable for 0.965 inch (about 24.5mm) astronomical telescope. 5Best Present: The astronomical eyepiece can be a gorgeous Halloween, birthday and Christmas gifts for family and friends to promote their interests in astronomical area.1 x_x000D_ _x000D_ TelescopeEyepiece