Yongnuo teleconverters

In addition to the YN35mm and YN50mm lenses, Yongnuo also has a 2x teleconverter for Canon EF lenses that sells for one third of the price of the original Canon version. We tested this Yongnuo YN-2.0X III teleconverter against the Kenko 2x Pro 300 teleconverter (which is one of the best) and by comparison Yongnuo YN-2.0X III has better corner sharpness and much reduced chromatic aberrations. In fact it basically eliminates the CA near the edge of the frame that you get with most teleconverters.