Every feature on SECO's 6400–10, 62mm nodal prism assembly works to give you superior pointing precision. Key to the design is its polycarbonate tilting holder featuring three prism offset positions at zero, -30mm, and the more precise Nodal position at -40mm.

The -40mm position helps eliminate pointing errors associated with short-distance work when the prism is not precisely pointed back to the instrument. The 6400–10 prism assembly features a silver-coated 62mm prism accurate to less than five arc seconds. The 20cm x 18 1/2cm (7.9" x 7.3") reversible target is designed to contrast with different backgrounds and is easy to reverse. By having all three positions right hand, the 6400–10 is an adaptable accessory essential for use in the field.

Features:

• Assembly features three prism offset positions, 0, -30 and -40 (nodal) 
• The 62 mm prism is silver coated and has a <5-second accuracy
• The reversible target comes in orange & white and black & white
• The height to center of glass: 0.33 ft (100 mm)
• Target Size: 7.9" x 7.3" (20cm x 18.5cm)
• Weighs 1.45 lb (0.66 kg)