Tele Vue 2" Eyepiece Barrel Extender.

This 10mm eyepiece appeals to skywatchers who want an extra performance edge

Offers a generous 52 degree field of view for crisp, sharp images

Fully multi-coated 4-element optics for the highest possible light transmission and better contrast

Provides the highest degree of color correction available in Plossl eyepieces anywhere

One-year limited warranty