With a wide 68-degree apparent field of view, the Ultima Duo 10mm eyepiece from Celestron has multi-coated optics to increase light transmission & contrast, & 8 lens elements in 5 groups to guarantee the best chromatic aberration & field curvature correction. It combines excellent optics with a built-in T-adapter for astroimaging, & will fit both 1.25 & 2 focusers so you can use it with almost any telescope. Simply remove the rubber eyeguard to expose the T-threads, & attach your DSLR or CCD camera with a compatible T-ring. The Celestron Ultima Duo 10mm Eyepiece is ideal for imaging bright solar system objects like the rings of Saturn, craters on the Moon, & Jupiter's Great Red Spot.