The T2 port features two rings inside and outside that rotate together to adjust lens and body alignment, enabling precise manual focus and framing. M42 and T/T2 ports are not interchangeable and require adapter rings to transfer between systems. Designed for EOSRF R RP and for Z5 Z6 Z7 Z9 Z30 cameras, as well as TO lenses (telephoto, super telephoto, and Made from metal alloy for durable, reliable construction and smooth manual focus adjustment to achieve results. Provides controlled, accurate focus adjustments for difficult shots, helping you maintain sharpness in challenging lighting or with long focal lengths. 23 use scenarios Scenario 1: Use legacy M42 lenses on Canon EOS R, RF, or Nikon Z series bodies by selecting the appropriate adapters, enabling precise manual focus for portraits or street photography. Scenario 2: Shoot telephoto wildlife or sports with enhanced focus control; the rotating dualring design allows finetuning focus and framing without stripping or refocusing repeatedly. Scenario 3: Switch between lens ecosystems during a single shoot (for example, from M42 to T/T2 compatible lenses) using the proper adapter rings, maintaining consistent manual focus performance across setups.