Vixen's SLV eyepiece series features a hexagonal shaped eyepiece barrel, long 20mm eye relief, and a twist up click stop eyecup to accommodate for the most comfortable eye position. Eye lens measures 20mm in diameter. Their slim and lightweight design makes them ideal for use in a binoviewer.
The optics of the SLV series is constructed from high grade Lanthanum glass with fully multi-coated surfaces for maximum light transmission. These eyepieces deliver remarkably clear and contrast rich star images right to the edge of their 50° apparent field of view.
Focal length: 4mm
Apparent field of view: 50°
Eye Relief: 20mm
Optical design: 7 lenses in 4 groups