Nothing you would be happy with. You would need a third party model like Kenko. You would lose autofocus capability. That zoom isn’t the best image quality to begin with; the extender will degrade it more. John Hoffman. Conway, NH. 1D X Mark III, Many lenses, Pixma PRO-100, Pixma TR8620a, LR Classic. Extender EF 1.4x compatibility with Mount Adapter EF-EOS R in Camera Accessories 12-05-2023; EOS 90D & EF 100-400mm - Auto Focus doesn't work with 2x extender in EOS DSLR & Mirrorless Cameras 11-25-2023; Mount Adapter EF-EOS R question about compatibility with Extender EF 1.4x III in Camera Accessories 11-14-2023 This reviewer received promo considerations or sweepstakes entry for writing a review. The Canon 1.4x teleconverter can help create excellent photos. Slight loss of maximum f/stop but also can obtain greater DOF (depth of field) at smallest f.stop. Keep lens surfaces clean or dust spot in photos. Always read the compatibility list before you buy a tel-con. The 2x is a bad idea even on lenses it is compatible with. IMHO, of course. Product description. Manufacturer description: Extending a lenses focal length by a factor of 1.4x, Extender EF 1.4X III incorporates phenomenal optical performance with minimal chromatic aberration and is a perfect complement to many of Canon super telephoto lenses. It features a built-in microcomputer for seamless communication among camera . Like all 2× teleconverters, it doubles the lens' focal length, at the expense of losing two stops of speed (doubling the f/number). The RF 100-500mm f/4.5-7.1 L IS becomes a 600-1,000mm f/11-14 L IS (oddly it only works with the 100-500 set from 300-500mm). The RF 600mm f/11 IS becomes a 1,200mm f/22 IS. The RF 800mm f/11 IS becomes a 1,600mm Kenko TELEPLUS HD pro 2x DGX Teleconverter for Nikon F. B&H # KETPHDPRO20N MFR # K-TPHDPRO2.0-N. 2 Reviews. Key Features. F-Mount Teleconverter/FX Format. 2x Magnification Factor. Multi-Layer Anti-Reflective Coating. Communication between Lens and Camera. Product description. Manufacturer description: Extending a lenses focal length by a factor of 1.4x, Extender EF 1.4X III incorporates phenomenal optical performance with minimal chromatic aberration and is a perfect complement to many of Canon super telephoto lenses. It features a built-in microcomputer for seamless communication among camera I have the Viltrox Speedbooster EF-EOS M2 for my canon M50 M2. When attaching the Canon EF 70-200mm IS USM ii to this booster and body the camera reads F/00 and will not switch to autofocus. When using the Viltrox EF-EOS M adapter the lenses operates fine. What Am I able to do to have this speed booster work with this lens? Call 13 13 83. Download drivers, software, firmware and manuals for your Extender EF 1 4x II. Online technical support, troubleshooting and how-to’s.

canon extender ef 1.4 x iii lens compatibility