The file is a manual (PDF file) for EXTENDER EF1.4X III / EF2X III. Download drivers, software, firmware and manuals for your Canon product and get access to online technical support resources and troubleshooting. That totally sucks I was so hoping it would be compatible and able to push up to 2.8:1 with the teleconverter / extender, as I love using my 2x teleconverter with the EF 100mm f/2.8L is usm macro lens I've got atm to push up to 2:1 Re: Extender EF 2x III Compatibility I think the problem is that the OP wants to shoot long (assumedly in excess of 300mm - 480mm FoV) and has an M-series camera and an EF kit lens. While it is possible to use an EF or EF-S lens with an M-series via the adapter, using them with an extender poses a whole new set of complications. Anyone tested Canon EF 100mm f/2.8L Macro IS USM + Canon EF 2x III Extender? Canon EF 100mm f/2.8L Macro IS USM is not there in the compatibility list. It is not in the compatibility list because it is not compatible - physically impossible to fit the Extende because it projects forwards. Mount Adapter EF-EOS R question about compatibility with Extender EF 1.4x III in Camera Accessories 11-14-2023; Looking to replacing the 18-55 kit lens with a tamron in EF & RF Lenses 08-28-2023; EF better image than RF on R6, Normal? in EF & RF Lenses 09-27-2022; Extender EF 2x III Compatibility in EF & RF Lenses 03-18-2022 Caution. 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. To enhance water and dust resistance, the Extender EF1.4X III and EF2X III have a rubber ring around the mount. Maintains Metering, Autofocus, and IS. Dust and Water Resistant. Extend the reach of select Canon RF-mount lenses with the Extender RF 2x. This teleconverter magnifies the image by 2x and retains full communication between the lens and camera body, enabling metering, autofocus, and image stabilization as well as the transmission of Exif data. Fotodiox EOS-2x-AF-Tele Black/Silver Pro Autofocus 2x Teleconverter Compatible with Canon EOS EF Full Frame Lenses and EF / EFs Cameras 3.5 out of 5 stars 309 $155.50 $ 155 . 50 icTspbz.

canon extender ef 2x iii compatibility