【Fully Coated Optical Lens】This 4mm telescope eye piece is made of high quality optical glass lens, perfect for observation of lunar craters details, planetary , and more; 【Fit For 1.25" Telescope Focuser】Standard 1.25inch barrel size, can be used with 1.25inch telescope focuser. Internal threads of the barrel enable eyepiece to be used with astronomy filters; 【Metal Construction】The 1.25inch telescope eyepiece is made of all metal construction for durable usage, also blackened for reducing glare as well as improving light transmission and contrast; 【Foldable Rubber Eye-cup】There're 2 ways to use eye-cup, fold up and fold down for your choice; 【Anti-lost design】Eyepiece interface recess portion can prevent the loss; 【1 Plastic storage box】Our telescope eyepieces are packaged with one Plastic storage box to protect your eyepiece from dust and moisture, which is easy to carry and storage;
Specification
Brand: Datyson Product No.: 5P9853A Origin: China Focal length: 4mm Lens size: 1.25 inches (31.7 mm) Lens material: metal aluminum Optical Lens material: optical glass Lens coating: Fully Coated Green Thread specification: M28.6X0.6mm Eye mask type: flip back type Product volume: 33.5 * 33.5 * 42mm Net weight: 35g Gross weight: 57g