1. Optical Design: 4 groups of 4 elements of optical structure, multi layer MC coating can suppress lens spot and , improve contrast and color authenticity.
2. Lens Type: A accuracy achromatic refractor design for nice peak contrast and flare control images. You can use this lens in M manual exposure mode.
3. 500mm F 6.3 Achromatic Refraction Telephoto Lens: The 500mm F 6.3 ultra long zoom lens is a nice choice for bird and wildlife photography as well as ultra long distance shooting.
4. Manual Focus Design: Accuracy scale, manual focus design supplemented by depth of field and distance scale, easy to use pre focus technology to provide , clear images.
5. Compatibility: When used with the included T2 port adapter , suitable for EF lens. Excellent grade alloy body, strong texture, beautiful appearance, fine process.
6. Physical Design: Includes a tripod mount and removable lens hood that helps minimize lens flare and ghosting. Rotatable tripod mount provides optimal balance and allows for quick and easy vertical format shooting when rotated.

Specification:
Item Type: 500mm F6.3 Manual Focus Telephoto Lens
Weight: 1685g/59.4
Material: Alloy and optical glass
Lens Structure: 4 elements and 4 groups
Focal Length: 500mm
Nearest Focusing Distance: 5m/16.4ft
Aperture: F6.3-F32
Front Filter Diameter: 86mm

packing list:
1 x Lens
2 x Lens Cap
1 x Adapter
1 x Wrench
1 x Storage Bag
1 x Instructions