SVBONY SV135 125 Zoom Eyepiece Zoom 7 to 21mm Telescope Eyepiece 5 Element 3 Group Telescope Accessories for Astronomic Telescopes Visual Planetary Nebula

One eyepiece for multiple uses this 721mm zoom eyepiece allows you to change magnification power without swapping out eyepieces can be used to view the lunar surface planets nebulae star clusters 5elements 3groups lens structure 5elements 3groups made of high index glass deliver sharp high contrast vistas get bright and true image colors 3652 field of view SV135 zoom eyepiece allows you to see different wide field of view under the same viewing conditions 1314mm eye relief with rubber eyecup provides comfortable long term viewing for people with or without glasses Standard 125inch eyepiece compatible with 125inch telescopes and accessories groove antidrop design effectively prevents accidental falling during use Tip For smooth zooming there is a gap between the zoom components of the zoom eyepiece Therefore noise from shaking is normal and does not affect use