The Ultima Duo 13mm Eyepiece from Celestron offers the perfect combination of convenience and performance. With a large field of view and long eye relief, you'll be able to take in the beauty of the night sky with ease. The fully multi-coated optics provide bright, sharp images, and the dual 1.25" barrels make it easy to switch between two different magnifications. Whether you're a beginner or an experienced astronomer, the Ultima Duo Eyepiece is