Achieve precise focus and full manual control with this adapter for EOS RF and compatible cameras. Built from a metal alloy for durable, stable operation and reliable manual adjustments. Designed for Canon EOS RF R cameras and Nikon Z5, Z6, Z7, Z30 cameras, as well as TO lenses (telephoto, super telephoto, and related types). Features: Manual focusing, manual dimming, and focusing. Practical benefits: Enables exact manual focus when autofocus is difficult or unreliable, such as with long telephoto or macro tasks. Provides durable, repeatable adjustments for consistent results across shoots. Works across multiple camera platforms (EOS RF R and Nikon Z series) and with telephoto style lenses, expanding your pairing options. Use scenarios: Scenario 1: Photograph wildlife or sports on a Nikon Z5/Z6/Z7/Z30 with a telephoto or super telephoto lens, using manual focus for precise subject lock when autofocus may lag. Scenario 2: Studio or outdoor portrait work with a Canon EOS RF R camera and a telephoto lens, employing manual focus to achieve exact focus plane and sharp subject rendering. Scenario 3: Using TO lenses (telephoto, super telephoto, and related types) with these cameras to maintain control over focus during video or still photography, ensuring consistent results across different focal lengths.