Features:Viltrox C-AF 2X TELEPLUS can make the focal length of all the for Canon EF lens increased to 2 times as respectively，and the auto-focus function of the original camera lens can be used perfectly， and don't change the EXIF information.C-AF 2X specially use for 100mm or more fixed focal length lens， but not recommend for use in less than 60mm of short-focus lens.Specification:Mount Type: for Canon EF-Mount lens Magnification: 2 timesDepth of field: Half of the original lens Constitution of the lens: 7 glasses，4 groupsFocus mode: full auto focusLens coating: Multi-coatedExposure factor: Approx 4 timesItem size: 6.7 * 5cm / 2.6 * 2.0in(D*H)Item weight: 131g / 4.64ozPackage size: 9.5 * 9.5 * 9.5cm / 3.7 * 3.7 * 3.7inPackage weight: 202g / 7.17ozPackage List:1 * Teleconverter2 * Covers1 * User Manual(Chinese&English)"
