Features: Easily alter the magnification ratio without installing any extension tube or teleconverter. Ideally suited for rapidly changing macro- photography scenarios. Designed also for normal shooting purposes with a 60mm focal length. An all-in-one solution for normal portrait shooting as well as ultra-macro photography. Houses with 9 elements- in 7 groups patented optical structure to provide great-deal of image-clarity and color renderness. The optical system consists of 2 major moving lenses groups in order to minimize the barrel distortion. Specifications: Material: alloy Thread: Focal length: 8-mm Aperture: F3.5 - making Angle of view: 180° Package Includes: 1 x 60mm f/2.8 lens 1 x Front Lens Cover 1 x Rear Lens Cover 1x Lens Pouch note: Please allow 1-3cm error due to manual measurement. please make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item.