Key Features. 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. Additionally, the Extender RF is dust and water Mount type:Canon EF-Mount lens; Note: * Not Compatible Camera Model : Canon 80D, 6D Mark II * Not Compatible Lens Model : Canon: EF 70-300mm f/4-5.6 IS USM; 100-400mm f/4.5-5.6L IS USM ; EF 24-105mm f/4L IS USM. Magnification:2 times(2X) Depth of Field:Half of the original lens; Min stacking focal length:Equal to the original lens Canon EF 1.4x III Extender. Canon 6D + EF 1.4x III Extender - handheld. Canon 6D Mk1 + EF 100-400mmL II lens + EF 1.4x III Extender AF will not work except with Live View but it will with Live View. AF speed is quite slow but the Bokeh is nice and the details are sharp without degradation in image quality. Excellent for birding. Canon EOS R5 Canon MP-E 65mm f/2.5 1-5x Macro Canon Extender EF 1.4x III Canon Extender EF 2x III Canon EF 35mm F2 IS USM +2 more Reply Reply with quote Reply to thread Complain The Canon Extender EF 2x III is an easy and relatively cheap way to double your telephoto range. The Canon Extender EF 2x III is also quite small and light. By putting the Extender between your telephoto lens and the camera, you reduce the field of view and bring everything closer. A Canon EF 70-200 mm f/2.8 L IS III USM thus becomes a 140-400 . Hi there, I am making a decision to buy one of these lenses for the EOS R, RF 70-200 or EF 70-200, and I need some suggestions badly. I am thinking of getting the EF mount for two reasons, the price and the possibility of adding a 2x teleconverter so that I can have a 140-400, as I read some posts suggesting it's quite impossible for Canon to make an extender for the mirrorless series Lens compatibility from EOS 1300D to EOS R7 in EF & RF Lenses 11-14-2023; Mount Adapter EF-EOS R question about compatibility with Extender EF 1.4x III in Camera Accessories 11-14-2023; Interesting EF 400 f2.8 IS II issue - EOS-1D X Mark III rendered unresponsive in EF & RF Lenses 11-12-2023; EF 100-400mm f/4.5-5.6L IS II USM Lens switches to The lens you describe, the EF 75-300mm f/4-5.6 III which often comes in a kit with the EOS Rebel T7, is not compatible with either EF extender. The EF Extenders can only work with the lenses which have clearance in the back to allow space for the extender's protruding element to sit inside. The teleconverters (TC) will multiply the focal length of any EF lens used with them by either 1.4x or 2x. So, a 300mm lens beomes a 420mm with a 1.4x TC and a 600mm lens with a 2x TC. Sounds great, but it comes at the cost of reduced maximum aperture and slowing of AF performance (typ. 50% for 1.4x and 75% for 2x). 1. 2X III works really well and maintain a reasonable sharpness only on Superteles, 100-400 II and on on 70-200 II and unfortunately not included the 100-400 I. It's a waste of money. kingfishers are one of the skittish creatures, it posts a challenge even with 600mm + 2x. If you use a 2x with 400, you may find the distance not usable as you

canon ef 2x iii extender lens compatibility