View in comfort!Celestron's star diagonal keeps your knees clean. It lets you view objects at a 90-degree angle to the direction the telescope is pointing. That means you don't have to grovel in the dirt to view objects overhead! Celestron's 90-degree star diagonal: it's a clear investment in viewing comfort! Note: objects viewed through the star diagonal will appear right side up but reversed left to right.Don't go to the star party without a NightVision flashlight.