The YN-2.0X teleconverter supports all
focal length of the Canon EF lens increase to two times
The YN-2.0X teleconverter is a high performance teleconverter which can allows all
focal length of the Canon EF lens increase to two times;and in most cases the original
camera autofocus function can be used faultlessly.
The magnification :2 times
Lens composition:7 elements in 4 groups
Barrel diameter:68mm approx.
Maximum aperture with the teleconverter
When teleconverter YN-2.0X is attached, the lens maximum aperture will be smaller by 2 stop
In the above case, the camera will compensate the exposure automatically