The new Vixen AXD telescope half-pillar was designed specifically for the Vixen AXD mount. Rock steady, solid construction melds perfectly with your astrophotography needs. Includes Vixen Five Year Warranty! The Vixen AXD Mount Half-Pillar is a cutting edge, very new product and detailed information is not yet available. As of now, it would appear the half pillar adds an additional 8" in height over the original tripod and weighs approximately 4 lbs. more.