Features: Adopts high quality plastic material, lightweight, sturdy 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: Plastic Color: Black Mount: EF Lens Ring Type: 13mm & 21mm & 31mm Magnification: 0.24 - 1.47 times Focusing Range: 4.2 - 21cm / 1.65 - 8.26inch Manual Focusing Length Range: 0.53 - 5cm / 0.12 - 1.97inch Suitable for cameras with EF mount Weight: Approx. 145g Package List: 1 x Lens Adapter Rings Set 2 x Lens Caps 1 x Storage Bag . Note: This product is only suitable for DSLR cameras, and the entry series of zoom lenses within 70MM, not suitable for mirrorless camera , prime lens.