Feature:

1.Fully multi-coated Premium eyepiece zooms to any focal length between 7 mm and 21mm

2.Zoom from low to high power in an instant with this versatile eyepiece

3.Compatible with any telescope that accepts 1.25” eyepieces

4.Premium optical design

5.Comfortable 18mm - 16.3mm eye relief more comfortable, especially for eyeglass wearers