Remarks: Many people will ask why switch between CDAF and PDAF. When lens use with CDAF mode with good contrast, you can get focus point across the frame. However, for older lens model, focus speed will be slow or not even focus. PDAF is the fastest way to focus for both AF-S and AF-C. The focus area is limited depends on camera model. There may be partial lenses and cameras that cannot use this adapter, we will update the firmware in time , also appreciate please tell me your camera and lens model if they are not compatible ,our engineers will update that firmware ASAP. We will upload the Upgrade Package regularly , please refer to VILTROX Official Website . Product features: - Support Sony A9/A7/A7R/A7S/A6XXX/NEX cameras and VG camcorders - Support Contrast Detection and Phase Detection Auto Focus mode - Support EF/EF-S lenses manufactured by Canon, Sigma, Tokina and Tamron - Record EXIF data includes aperture, focal distance etc. - Support on camera aperture adjustment and metering - Support lens Image Stabilizer - Extend approx. 4.5mm max. Distance can be adjust accordingly - The only adapter in the market CNC adatper tube and camera mount in one piece for the best strength. *VG series does not support AF Package contents: 1* EF-NEX IV Lens Adapter 2* Lens front/rear caps 1* User Manual(English)