1、Adopts high quality metal materials, lightweight, sturdy and durable 2、Can decreases the lens focal length for close-up shot and won't alter the image quality 3、3 rings/set, 12mm, 20mm, 36mm, can be used independently or in combination to get different magnification 4、Fits tightly onto cameras, copper conducts inside support auto focusing 5、Good accessory for photography lovers, a good substitution to expensive macro lenses for macro photographyFeatures: Adopts high quality metal materials, lightweight, sturdy and durable. Can decreases the lens focal length for close-up shot and won't alter the image quality. 3 rings/set, 12mm, 20mm, 36mm, can be used independently or in combination to get different magnification. Fits tightly onto cameras, copper conducts inside support auto focusing.Good accessory for photography lovers, a good substitution to expensive macro lenses for macro photography. Specification:Brand: MeikeModel: MK-S-AFColor: BlackOptions: A(Alloy), B(Plastic)Magnification: Adjustable (12mm&20mm&36mm)Suitable for Sony Alpha DSLR Weight: Approx. 182-211gPackage List: 1 x Lens Adapter Rings Set1 x Manual Features: Adopts high quality metal materials, lightweight, sturdy and durable. Can decreases the lens focal length for close-up shot and won't alter the image quality. 3 rings/set, 12mm, 20mm, 36mm, can be used independently or in combination to get different magnification. Fits tightly onto cameras, copper conducts inside support auto focusing.Good accessory for photography lovers, a good substitution to expensive macro lenses for macro photography. Specification:Brand: MeikeModel: MK-S-AFColor: BlackOptions: A(Alloy), B(Plastic)Magnification: Adjustable (12mm&20mm&36mm)Suitable for Sony Alpha DSLR Weight: Approx. 182-211gPackage List: 1 x Lens Adapter Rings Set1 x Manual 1 x Lens Adapter Rings Set1 x Manual