This is a 0.55X C-mount lens for Nikon microscopes, made of stainless steel and high-grade optical glass. The lens adapts C-mount cameras with sensors in the 1/1.8" to 1/2.5" range, to Nikon's E100, E200, 50i, 55i, 80i, 90i, Ni series, Ti series, SMZ800, SMZ1000, and SMZ15000 microscopes. Features & Specifications : Power: 0.55X Sensor Compatibility: 1/1.8" to 1/2.5" Compatibility: Nikon E100, E200, 50i, 55i, 80i, 90i, Ni series, Ti series, SMZ800, SMZ1000, SMZ15000 Camera Mount: C-mount(1" / 25.4mm diameter) Manufactured under ISO 9001 Quality Control Standards Warranty: 1 Year