Feature:1. The product is made of high quality aluminum alloy, can be used for any 1.25 inch astronomical telescope and concentrator.2. For lens with the same refractive index, 62 aspheric eyepiece are more thin and light than spheric eyepiece, and are mainly used for planetary observation.3. The wide angle 62 aspheric eyepiece can obtain the maximum detail and clarity in the entire field of view, and obtain almost distortion free images.4. This eyepiece provides high magnification, looks closer and more detailed, for viewing the moon and planets.5. With anti loss design, the groove part of the eyepiece interface can prevent loss, suitable for viewing scenery, bright celestial bodies, nebulae, etc.Specification:Item Type: Aspheric EyepieceMaterial: Aluminum alloyApplication: HD full coated telescope accessoryType4mm 62 Aspheric Eyepiece 1.25in10mm 62 Aspheric Eyepiece 1.25in23mm 62 Aspheric Eyepiece 1.25inFocal Length4mm / 0.16in10mm / 0.39in23mm / 0.91inVision626262Fitting DiameterStandard 1.25in / 31.75mmStandard 1.25in / 31.75mmStandard 1.25in / 31.75mmLens Diameter0.39in / 10mm0.39in / 10mm0.87in / 22mmCoatingOptical Lens, Fully Coated High DefinitionOptical Lens, Fully Coated High DefinitionOptical Lens, Fully Coated High DefinitionThe Structure of The Optical SystemAspheric EyepieceAspheric EyepieceAspheric Eyepiece.Package List:1 x Aspheric Eyepiece 2 x Lens Protection Dust CoverNote:Do not look directly at the sun, otherwise it will burn your eyes