Key Features

• 7-21 zoom eyepiece

  Allows you to change magnification power without swapping out eyepieces; bring you a better observation experience in a comfortable situation with high-contrast imaging; designed primarily for viewing lunar surfaces; jupiter and saturn; nebulae; clusters; and diffuse nebulae.

• 7-Elements/4-groups structure

  Made of high index glass deliver sharp, high contrast vistas.

• 15mm long eye relief

  Ensure relaxing observation and keep your eyes comfortable, especially for users who wear glasses; the rubber eye guard provides comfort and blocks unwanted stray light.

• M28.5*0.6 standard thread

  Convenient for connecting filter; compatible with 1.25-inch telescopes and accessories; works great for photography.

• Direct & Descriptive

  A simple twist of the zoom eyepiece housing changes the focal length from 7mm to 21mm, providing a variety of viewing magnification powers.