I have been looking for a quick compatibility chart online for the Canon EF 2x and 1.4x extenders. Thankfully B&H has been kind enough to translate the chart into an easy to read table found below. There's two sets of links below that will get you to the 2x and 1.4x charts.
A Welland wrote: Does anyone know if the Canon EF 28-300mm f/3.5-5-6 L IS USM lens is compatible with the new 1.4X II extender/teleconverter? No. The only Canon zooms that can mate with the Canon EF 1.4x II and 2x II are the four 70-200Ls, and the 100-400L.
Date last updated: 06/10/2019 Description These lenses can be used with either the Extender EF1.4X III or the EF2X III. Solution Usable lenses: *: Using an Extender with this lens may result in incorrect autofocus. If your camera has an AF microadjustment function, do the AF microadjustment.Extenders, also often called teleconverters, are optical accessories that attach to the rear end of a lens to increase the focal length. The two most common varieties are 1.4x and 2x extenders, though Nikon also makes a 1.7x version as well. As you’ve probably guessed, the number represents the factor by which the focal length gets multiplied. The Canon EF 2x II Extender. is a high-quality teleconverter that preserves the image quality of the lens it's mounted to and multiplies its focal length by 2x.. When combined with pro level EOS cameras & EF supertelephoto lenses with image stabilization, near imperviousness to weather extremes is achieved thanks to rubber gasket seals. WFzlo6.
canon extender ef 2x ii compatibility chart
