Features: Transform For FD-EOSR Mount Lens into a powerful tool For EOSR series Full Frame Mirrorless Camera with this solid full metal mount lens adapter, ensuring precise fit and reliabled performances. From aluminum, this adapter allowing manual control over apertures and focusing to achieve Infinitely focusing while maintaining correct registration distance. For photography enthusiasts and professional photographers who appreciate the art of manual photopraphy, offering a hands on experience For FD-EOSR lens on modern mirrorless cameras. Perfectly for capturing stunnings landscapes, portraits, and street photography, this adapter enhances creative flexibility by enabling the use of vintaged lens in diversed scenario. Enjoy the tactile satisfaction of manual adjustments and explore new creativity with this essential accessory For EOSR mirrorless cameras, bridging between old and new technology. Specifications: Inner diameter: about 48mm/1.89in Component:Aliminum For FD-EOSR EOSR series Full Frame Mirrorless Camera Note: Due to problem of lighting effect, there might be tolerances in product, please understand. Please allow 1cm errors due to measurement. Package includes: 1PC Lens Mount Adapter