The Polar Alignment Scope enables highly accurate polar alignment of the SkyView Pro, Atlas EQ-G and Atlas Pro AZ/EQ-G equatorial telescope mounts. Accurate polar alignment is essential for precise tracking, especially at high powers, and for astrophotography guiding. This accessory threads into the telescope mount’s housing along the Right Ascension axis. The optics feature a printed reticle that makes aligning on Polaris easy and fast. Designed for use in northern hemisphere only. Includes complete instructions. Also compatible with Celestron CG-5 telescope mount.