Feature:1. Strong Versatility: The telescope eyepiece has a 2 inch standard interface, which is suitable for 2 inch astronomical telescopes. You can purchase additional filters for astronomical telescopes according to your needs.2. Focal Length and Field of View: The telescope eyepiece has a focal length of 33mm and a large field of view of 52 degree, which is comfortable to watch, easy to find targets, and can watch a wider range of nebulae, star clusters, landscapes, the surface of the moon, etc.3. Optical Glass Lens: The lens of eyepiece adopts optical glass, FMC coating process, small chromatic aberration, high light transmittance, low dispersion, and clear image.4. Metal Lens Barrel: The lens barrel of telescope eyepiece is made of metal material, which is sturdy and durable, with internal matting treatment to reduce reflections.5. Foldable Eyecup Design: The 2 inch 33mm telescope eyepiece is designed with a foldable eyecup, which is not easy to be fatigued when viewing for a long time.Specification:Item Type: EyepieceMaterial: Plastic, Metal, Optical GlassInterface Specifications: 2 InchFocal Length: Approx. 33mm / 1.3inField of View: 52 DegreeExit Pupil Distance: Approx. 13mm-18mm / 0.5in-0.7inLens Coating: FMCColor: As Pictures ShownWeight: Approx. 470g / 16.6oz.Package List:1 x Eyepiece2 x Dust Cover