Vixen Optics 35517 USA Vixen Polarie Star Tracker Mount with Tripod (White) Tracking Mode Celestial tracking rate1/2 of celestial tracking rate. Solar tracking rate Mean solar timeLunar tracking rate Mean lunar timeUsable in both northern and southern hemispheres Maximum Loading weight 7lbs Polar sight hole About 8.9 Degree field of view Weight 6 lbs.Minimum working height: 22.0 inches. Maximum working height: 72.5 inches Optional accessory A dedicated polar axis scope for Polarize