Seco 62 mm Nodal Point Prism Assembly The Seco 6400-00 Eclipse™ 62 mm Nodal Point Prism Assembly is a high-precision solution designed for accurate angle and distance measurements in demanding surveying applications. Featuring a water-resistant, nitrogen-charged prism canister and a reversible target, it delivers reliable performance in varying environmental conditions while maintaining optical clarity and measurement consistency. Engineered for nodal point operation, this assembly can be set to a -40 mm prism constant , providing optimal angle accuracy even when the prism is tilted in either the horizontal or vertical axis. A -30 mm adapter is included for compatibility with standard survey setups, offering flexibility across different workflows. Key Features • 62 mm precision prism with nitrogen-charged, water-resistant canister • -40 mm nodal prism constant for improved angular accuracy when tilting • Includes -30 mm adapter for standard configurations • Reversible target for enhanced visibility and versatility • Designed for high-precision angle and distance measurements • Height to center of prism: 115 mm (0.38 ft)