Features: 500mm f6.3 Mirror Lens, integrating the advantages of reflective optic and refractive optic, provides you with an extremely clear picture with minimum color abberation. Multi-coated and optuical glass element, wear-resistant, moisture-proof, anti-corrosion, pollution resistant and durable. Quality aluminum alloy body, solid in texture, exquisited in appearance and fine in workmanship. Large aperture of F6.3 greatly increases the amount of light entering, so as to obtain more reliable and safe shutter-time. Good choice for shooting sport activities, birds and wildlife as well as ultra-long distance photography. Specifications: Material: Magnesium Aluminum Alloy+Optical Glass+Multi-layer Coating Size: Standard Size Color: Black, White(optional) Type: PK-mount, AF-mount, OM-mount, F-mount, M4/3, S-mount, E Mount, XF-mount, EF-M Mount(optional) Name: 500mm F6.3 Telephoto Mirror Lens Focal Length: 500mm Filter Size: 95mm(front), 34mm(rear) Lens Construction: 7 Element in 6-Group Focus-section: super distant fixed focusing Max-aperture: F6.3 Frame: full frame Closest Focusing Distance: 2.0m/78.74inch Lens Type: Manual Lens Focus-control: single-focus lens Angle of View: 5 Degree Lens:Multi-coated Anti-shake: no Length: 119.5mm/4.7" Max-diameter: 98mm/3.8" Note: Please allow 0-1cm error due to manual measurement, make sure you do not mind before you order. Please allow slight chromatic aberration due to different display resolutions. Package includes: 1x 500mm F6.3 Telephoto Mirror Lens 1x T2 Mount Adapter Ring 1x Lens Pouch