Description: 100% brand new and high quality. Function: Both camera side and objective side of the adapter are made of aluminum, precision-machined and polished. The fully metallic adapter is designed to securely fit the objective but can still be easily removed when not needed. Although the objective physically fits, this adapter does not retain automatic aperture (AE-metering) or other automatic functions. Perfect fit and solid connection - the objective has no play, gap or wobble when mounted on the adapter and no adjustments are needed to fit your objective. Designed to achieve infinity focus while maintaining proper back focus distance required to support CRC objectives or objectives with floating elements. With optical glass, supports infinity focus. Infinity focus objective adapter fits only, other accessories shown in the picture are not included Compatible models: for M42-mount objectives for Nikon DSLR camera for Nikon D5600, D500, D5, D810A, D7200, D5500, D750, D810, D5300, D3300, Df, D610, D7100, D5200, D600, D3200, D800/D800E, D4S, D4, D5100, D7000, D3100, D300S, D3000, D3X, D90, D700 Specifications: Item type: Infinity focus objective adapter Material: Metal Size: Objective diameter: 55 mm (2.1 in), Height: 15 mm (0.5 in) Color: Black Quantity: 1 piece Note: No retail packaging. Transition: 1 cm = 10 mm = 0.39 in Tolerance of 1-3 mm due to manual measurement. Please ensure you have no objections before placing a bid. Due to differences between screens, the image may not reflect the actual color of the product. Thank you Package includes: 1 x Infinity focus objective adapter