SVBONY 7mm to 21mm 1.25inch Zoom Eyepiece Fully multi-Coated 6-Element 4-Group Optical Design Black

Feature 1 Fully multi coated Premium eyepiece zooms to any focal length between 7 mm and 21mm2 Zoom from low to high power in an instant with this versatile eyepiece3 Compatible with any telescope that accepts 1 25 eyepieces4 6 Element 4 Group premium optical design5 Comfortable 18mm 16 3mm eye relief more comfortable especially for eyeglass wearersSpecification 1 Brand SVBONY2 Model SV1353 Focal length 7 21mm4 Zoon Type Linear5 Lens structure 6PCS 4group6 Eye Relief 18mm 16 3mm7 Interpupillary Dist 15mm8 Barrel Size 1 25 9 Field of view 57 40° 10 Coatings Fully Multi Coated Green 11 Rubber Eye Guard Yes 12 Meterial Metal13 Color Black14 Thread Size M28 5 0 615 Overall length 93mm16 Net Weight 133g 4 67ozPackage Included 1 x SVBONY SV135 7 21mm 1 25 inch Eyepiece1 x Lens Covers Objective and Eyepiece 1 x Lens Cleaning ClothDetails Pictures