Features: Achieve infinite focus and manual control with the T2 adapter ring for EOS-RF and Nikon-Z cameras. Crafted from a durable metal alloy, this adapter ring allows you to manually adjust lens focus and aperture for optimal results. Designed for EOS-RF R RP R5 R6 and Nikon-Z5 Z6 Z7 Z9 Z30 cameras, as well as TO lenses (telephoto, super telephoto, mirror, and telescopes). Functions: Manual focusing, manual aperture control, infinite focusing. The T2 port consists of two rings, inside and outside, which can rotate relative to each other to adjust the angle between the lens and the body. M42 and T/T2 ports are not interchangeable and require adapter rings for conversion. Specifications: Item: T2 Metal Telescope Adapter Ring Model for: T2 EOS RF / T2 for Nikon-Z EOS RF Suitable for EOS RF RP R5 R6 and other R-port mirrorless cameras. Material: Metal Alloy Features: Manual focusing, manual aperture control, infinite focusing. T2 for Nikon-Z Suitable for bodies: Nikon-Z5 Z6 Z7 Z9 Z30 and other Z-port mirrorless cameras. Note: Due to lighting effects and shooting angles, there may be slight variations in the product. Please understand. Allow 0-1 cm error due to manual measurement. Package Includes: 1PC Telescope Adapter Ring