The YN-2.0X III is the updated version of YN2.0X II.
Suit for Below EF EOS Camera Lens:
EF 135mm f/2L USM270mm f/4
EF 200mm f/2.8L USM400mm f/5.6
EF 200mm f/2.8L II USM400mm f/5.6
EF 200mm f/1.8L USM 400mm f/3.6
EF 200mm f/2L IS USM400mm f/4
EF 300mm f/4L USM600mm f/8
EF 300mm f/4L IS USM600mm f/8
EF 300mm f/2.8L USM 600mm f/5.6
EF 300mm f/2.8L IS USM600mm f/5.6
EF 400mm f/5.6L USM800mm f/11
EF 400mm f/4L DO IS USM800mm f/8
EF 400mm f/2.8L USM 800mm f/5.6
EF 400mm f/2.8L II USM 800mm f/5.6
EF 400mm f/2.8L IS USM800mm f/5.6
EF 500mm f/4.5L USM 1000mm f/9.5
EF 500mm f/4L IS USM1000mm f/8
EF 600mm f/4L USM 1200mm f/8
EF 600mm f/4L IS USM1200mm f/8
EF 800mm f/5.6L IS USM1600mm f/11
EF 100-400mm f/4.5-5.6L IS USM200-800mm f/9.5-11
EF 70-200mm f/4L USM F140-400mm f/8
EF 70-200mm f/4L IS USM140-400mm f/8
EF 70-200mm f/2.8L USM140-400mm f/5.6
EF 70-200mm f/2.8L IS USM140-400mm f/5.6
EF 70-200mm f/2.8L IS II USM140-400mm f/5.6
EF 300mm f/2.8L IS II USM600mm f/5.6
EF 400mm f/2.8L IS II USM800mm f/5.6
EF 500mm f/4L IS II USM1000mm f/8
EF 600mm f/4L IS II USM1200mm f/8
EF 1200mm f/5.6L USM 2400mm f/11
Precautions:
Do not attach two or more Extenders on the same camera.Doing so will degrade the optical performance and the camera will not be able to obtain proper exposure readings.
In order to maintain the precision of autofocus control,the speed of automatic focusing will slow down when using the Extender.
When the lens taken from cold to warm places, the surface and internal condensation may occur. In order to prevent condensation, when taking the lens from cold to warm places, please first put the lens in sealed plastic bags, then take out after the lens warming up. And use the same method when taking out from the warm to cold places.
Reviews YongNuo YN-2.0X III Teleconverter Auto Focus Mount Lens for Canon EOS EF Lens