Note: 1.this is the manual lens, when you use it before ,pls set you camera on the M model and Manual focus!2.telephoto lens, Because there is no anti-shake function, please use it with a tripod and a timed shutter release to avoid blurry pictures!This 500mm Manual ultra-telephoto, multi-coated mirror lens is a brand new lens. Incredibly compact and lightweight, this lens is ideally suited for sports and wildlife photography.It has a fixed aperture of f/6.3 which is faster than most other 500mm lenses.This lens attaches to your camera with the included T-Mount adapter and works with auto focus cameras in manual mode. Key Features: Compact, Ultra-telephoto LensAdvanced Reflex Mirror DesignSuper Spectra CoatingsAluminum Alloy ConstructionManual Focus, Fixed Circular ApertureCompatible with Most SLRs and DSLRsCamera-specific T-mount Adapter SuppliedMaximum Aperture: f/6.3Focal Length Type: ZoomFocal Length: 500 mmFilter size: 95mmLens Construction: 6 Elements in 6 GroupsMaximum Diameter: 98.0mm or 3.86 InchesMinimum Focusing Distance: 2.0m or 6.1 ft.Fixed Aperture: f/6.3Lens Type: ManualWeight: 705g or 24.87 oz. T-Mount Adapter Required and Included specification the Manual 500mm f/6.3 Multi-Coated ED Mirror Lens is incredibly powerful.This lens is designed and constructed with ED Glass for enhanced dispersion.It's an excellent addition to any photographer's collection. This lens is a high-quality,computer designed product that incorporates the merits of both reflex optics and refraction optics.This combination provides the user with an ext