Features: C-port M42x0.75mm adapter rings, male C-port to T2 female thread lens converter. Allows you to attach C-mount lenses to T2 mount cameras. Constructed from quality metal aluminum material for lightweight and durable use. Easy to install and remove. Note: There are no electrical contacts in the adapter rings, so infinity focus is not supported. Specifications: Material: Metal Aluminum Color: Black Internal thread specification: M42x0.75mm (commonly known as T2 thread) Internal thread depth: 5mm External thread specification: C-port thread External thread depth: 3mm Flange distance: 6.5mm Package Includes: 1 x Lens Adapter Note: Please allow 1-2 cm errors due to manual measurement. Slight color variations may occur due to different display resolutions.