1Adopts high quality plastic material, lightweight, sturdy and durable 23 rings make 7 different combinations, which extends the lens focal length for close-up shot, and won't alter the optical quality to ensure there is no glare in image 3Provides images with better quality than close-up filter, a good substitution to expensive macro lenses for macro photography 4Electronic contacts keep the light metering and auto focusing function of camera 5Fits tightly onto camera EF mountsFeatures: Adopts high quality plastic material, lightweight, sturdy and durable 3 rings make 7 different combinations, which extends the lens focal length for close-up shot, and won't alter the optical quality to ensure there is no glare in image Provides images with better quality than close-up filter, a good substitution to expensive macro lenses for macro photography Electronic contacts keep the light metering and auto focusing function of camera Fits tightly onto camera EF mounts Good accessory for photography lovers Specification:Material: PlasticColor: BlackMount: EFLens Ring Type: 13mm & 21mm & 31mmMagnification: 0.24 - 1.47 timesFocusing Range: 4.2 - 21cm / 1.65 - 8.26inch Manual Focusing Length Range: 0.53 - 5cm / 0.12 - 1.97inch Suitable for Canon cameras with EF mountWeight: Approx. 145gPackage List: 1 x Lens Adapter Rings Set2 x Lens Caps1 x Storage Bag