Specification BrandGOMUTypeStandard type AModel10 30x50 Magnification10 30xVisual angle7 5 4 8Objective diameter50mmEyepiece diameter15mmExit pupil diameter19 5 15 4mmExit pupil distance5 1 7mmCoatingFMCField of view71 35 1000mFocusingEyepiece focusSize198 x 89 x 76mm 7 79 x 3 5 x 2 9inchWeight445gFeatures Nitrogenization waterproof anti fog and water resistant HD porro prism structure high light transmittance clear and bright imaging 50mm large objective 10 30 zoom focus variable magnification 342ft wider field of view for watching FMC green coating low light loss Package Included 1 x Telescope1 x Pouch1 x Strap1 x Manual1 x Cleaning cloth