Zoom Eyepiece - 8-24 mm - 1.25"8mm 24mm focal length 40 60 Field of View 15mm 18mm Eye Relief Zoom from low to high power in an instant with this versatile eyepiece! Compatible with any telescope that accepts 1. 25 eyepieces This fully multi coated premium eyepiece zooms to any focal length between 8 mm and 24 mm pick the best magnification for your subject The amazingly versatile Celestron 8 mm 24 mm Zoom Eyepiece allows you to choose from a variety of magnifications in a flash!