ITEM NAME:1.25'' 4mm Plossl Telescope Eyepiece (Aluminum Alloy + Optical Glass) Description: This is a very nice high power eyepiece. 1.25 inch 4mm plossl eyepiece, gives the widest viewing field along with extra sharpness and long eye relief. Perfect for broad-field lunar observations, medium-sized star clusters, and a wide range of cloudy nebulas. Comes with sturdy plastic case-proect the eyepiece from dust and moisture. Soft rubber eye guard that's custom fitted with a bayonet mount. Threaded for standard 1.25 inch astronomy filters and barlow lens. Specification: Focal Length: 4mm Size: 1.25 inch /31.7mm Telescope Common Eyepiece Interface The Structure of the Optical System: Plossl Eyepiece Coating: Fully Coated Height (Total): 50mm Apply: Watch the Scenery, Bright Celestial Observations, Nebula and so on Package Includes: 1 Piece Plossl 4mm Eyepiece SKU: CKX0013617677016716.The Structure of the Optical System: Plossl Eyepiece. 1 Piece Plossl 4mm Eyepiece. This is a very nice high power eyepiece. Soft rubber eye guard that's custom fitted with a bayonet mount. Focal Length: 4mm.
