Features:Brand new and high quality. Made of aluminum alloy, very durable. The FD-AI lens mount adapter is suitable for Canon FD mount lenses and for Nikon AI F-mount SLR camera body. This is the adapter for Canon FD manual focus lenses used on for Nikon auto focus camera mount. An optical ir-correction lens is equipped with in the middle of the lens mount adapter, whose high transparency is more than 98.5%, with multi-layer coating technology and color balance design, to ensure better optical performance of the FD lenses.Other features: Full manual control, manual focus, manual exposure and automatic timer. The correction objective distance can be used as well as the focus to infinity, which has a little impact on imaging. Specification:Color: blackMaterial: Metal, GlassCompatible Lens: for Canon FD lensesCompatible Camera: for Nikon AI F-mount SLR bodyFocus Mode : Manual Focus ItemDimensions: Approx. 6.5*6.5*1.5cm/2.6*2.6*0.6inWeight: Approx. 73gPackage List: 1 x FD-AI Adapter ring