Yongnuo Extender EF 1.4x III Teleconverter for Canon EF DSLR




PRODUCT HIGHLIGHTS
-EF Mount Teleconverter
-1.4x Magnification Factor
-Maintains AF and AE with Select Lenses

Dedicated to select Canon EF-mount lenses, the Extender EF 1.4x III Teleconverter from Yongnuo allows you to increase the effective focal length of lenses for greater reach. The electronic design of the teleconverter permits communication between compatible lenses and camera bodies in order to support autofocus and auto-exposure, and the optical design is comprised of seven elements in three groups in order to maintain image quality.
Compatibility

The following lenses are supported with full autofocus:
Canon EF 135mm f/2L USM, EF 180mm f/3.5L Macro USM (AF supported from 2.6' / 80 cm to infinity), EF 200mm f/2L IS USM, EF 200mm f/2.8L II USM, EF 300mm f/2.8L IS II USM, EF 300mm f/2.8L IS USM, EF 300mm f/4L IS USM, EF 400mm f/2.8L IS II USM, EF 400mm f/2.8L IS USM, EF 400mm f/4 DO IS II USM, EF 400mm f/4 DO IS USM, EF 500mm f/4L IS II USM, EF 500mm f/4L IS USM, EF 600mm f/4L IS II USM, EF 600mm f/4L IS USM, EF 70-200mm f/2.8L IS II USM, EF 70-200mm f/4L IS USM, EF 70-200mm f/4L USM, and EF 200-400mm f/4L IS USM Extender 1.4x (without 1.4x extender in use)

The following lenses are supported only when used in conjunction with a Canon EOS-1D X, 1Ds Mark III, 1Ds Mark II, 1Ds, 1D Mark IV, 1D Mark III, 1D Mark II N, 1D Mark II, 1D, 1V/HS, 5D Mark III, or 7D Mark II camera, and the only the central AF point will be available:
Canon EF 400mm f/5.6L USM, EF 800mm f/5.6L IS USM, EF 100-400mm f/4.5-5.6L IS USM, EF 100-400mm f/4.5-5.6L IS II USM, and EF 200-400mm f/4L IS USM Extender 1.4x (with 1.4x extender in use)

The EF 70-200mm f/2.8L USM lens is also compatible, however only central autofocus is supported.

Yongnuo Extender EF 2X III Teleconverter for Canon EF DSLR




PRODUCT HIGHLIGHTS
-EF Mount Teleconverter
-2.0x Magnification Factor
-Communication Between Lens & Camera
-Compatible with Select EF Mount Lenses

When your telephoto lens isn't quite long enough, the Extender EF 2X III Teleconverter from Yongnuo can help you double its reach. Designed to work with select Canon EF mount lenses, this teleconverter provides a 2x magnification factor that effectively doubles the focal length of your lenses. This takes a 400mm f/2.8 and transforms it into an 800mm f/5.6. Featuring electronic communication from the lens to the camera, this teleconverter allows for all standard functions of the lens to work as normal, including autofocus and image stabilization.

Compatible Lenses
EF 135mm f/2L USM
EF 200mm f/2.8L USM
EF 200mm f/2.8L II USM
EF 200mm f/1.8L USM
EF 200mm f/2L IS USM
EF 300mm f/4L USM
EF 300mm f/4L IS USM
EF 300mm f/2.8L USM
EF 300mm f/2.8L IS USM
EF 400mm f/5.6L USM
EF 400mm f/4L DO IS USM
EF 400mm f/2.8L USM
EF 400mm f/2.8L II USM
EF 400mm f/2.8L IS USM
EF 500mm f/4.5L USM
EF 500mm f/4L IS USM
EF 600mm f/4L USM
EF 600mm f/4L IS USM
EF 800mm f/5.6L IS USM
EF 100-400mm f/4.5-5.6L IS USM
EF 70-200mm f/4L USM
EF 70-200mm f/4L IS USM
EF 70-200mm f/2.8L USM
EF 70-200mm f/2.8L IS USM
EF 70-200mm f/2.8L IS II USM
EF 300mm f/2.8L IS II USM
EF 400mm f/2.8L IS II USM
EF 500mm f/4L IS II USM
EF 600mm f/4L IS II USM
EF 1200mm f/5.6L USM

Depending on your camera, some autofocus functions may not operate when the teleconverter is in use.