Viltrox C-AF 2XII AF Auto Focus Teleconverter Lens Extender Magnification Replacement for Canon EF Mount Lens 7D 6D 7DII 80D 5D2 5D3 5DS 5DSR 1DMark I/II/III/IV 1DS Mark I/II/III 1DX DSLR Camera

Viltrox C-AF 2XII TELEPLUS can make the focal length increased to 2 times,and the auto-focus function of the original camera lens can be used perfectly, and don't change the EXIF information. C-AF 2XII specially use for 100mm or more fixed focal length lens, but not recommend for use in less than 60mm of short-focus lens.

Features:
Replacement for Canon EF-Mount 100mm and above Lens. (Perfect for 200 ~ 500mm lens, lens under 60mm is not recommended.)
Can increase the original lens focus length to 2 times.
Support lens' AF function (Auto Focus) and won't affect to Exif information.
Adopt 7 optical glasses, 4 groups, the depth of field is half of the original lens.
Good helper for long distance photography.
With upgraded USB firmware interface.

Specifications:
Brand: Viltrox
Model: C-AF 2XII
Mount Type: For Canon EF-Mount Lens
Magnification: 2X
Depth of Field: Half of the Original Lens
Min Stacking Focal Length: Equal to the Original Lens
Constitution of the Lens: 7 Glasses, 4 Group
Focus Mode: Full Auto Focus
Lens Coating: Multi-coated
Exposure Factor: Appro. 4 Times (Equal to 2 aperture)
Item Size: 6.7 * 6.7 * 6.7cm / 2.6 * 2.6 * 2.6in(With front & rear cover)
Item Weight: 159.5g / 5.6oz
Package Size: 9.4 * 9.4 * 9.1cm / 3.7 * 3.7 * 3.6in
Package Weight: 210.5g / 7.4oz

Package List:
1 * Teleconverter Lens with Front & Rear Covers
1 * User Manual(English/Chinese)

Note:
Camera and lens are not included.