The Canon extenders will not work with the EF-S lens which is why I have the Kenko 2x extender. The bumblebee was two cheap third party extenders stacked and wide open at F/16. I often use EF100-400mm f/4.5-5.6L IS II USM +2x III which autofocuses well on EOS R5. Focus is only available in Live View mode with the extender, but works pretty well. The lens reports back an aperture of f/13 fully open at full zoom. Handheld use is probably not possible at 1200mm, i.e. 600mm full zoom of the lens alone and 2x additional from the extender. I thought I had read that this particular combination won't work at all. 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 Canon EF Extender 2x III is designed to provide extended range with Canon L-series telephoto lenses. Key features include: Improved optical performance. Integrated processor. Fluorine coating on front and rear elements. Read More. Canon Lens Mount Adapter EF-EOS M with Removable Tripod Mount. SALE. Small, lightweight adaptor for EOS M range of cameras. Removable tripod mount. Compatible with all EF and EF-S lenses. DKK 900,00 Was DKK 1.060,00 Save DKK 160,00. Eligible for free delivery. Add to Basket. Add to wishlist. Mount Adapter Allows EF/EF-S Lens Compatibility with the EOS R Camera. Drop-in Filter Adapter Allows Use of a Variable ND Filter (from ND3 to ND500 - equivalent to 1.5 to 9 f-stops).* Dust- and Water-resistant. Exterior Design Matched to EF Lenses. Metal Mount on Both Lens and Camera Sides Provide Rugged Flexibility. BTsm1. Greetings, This information might help. The EF 400mm f5.6 is supported According to the manual, it will AF, but if trouble is encountered, then manual focus should be employed. Ability will depend on shooting conditions and the lens. Normadel is correct minimum aperture is f11 at 800mm extender- Yes, but you're asking the wrong question. The Canon EOS EF 2x III will work with the Canon 90D, because it has an EF mount. Except, as others have pointed out, teleconverters are designed to only work with specific lenses. Someone posted a link to the "Supplemtary Information" User Guide for the 90D. Refer to that for a complete listing of Buy this product as Renewed and save $30.98 off the current New price. Sigma APO Teleconverter 2x EX DG for Canon Mount Lenses (Renewed) $249.00 & FREE Shipping. (2) Works and looks like new and backed by the Amazon Renewed Guarantee. 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). I currently own the EF 70-200 f/2.8L IS II USM lens and am considering purchasing the EF 100-400 f/4.5-5.6L IS USM lens for an upcoming African safari trip. Curious to opinions on whether I would be better off buying the EF 2.0X III extender and using it on the 70-200 f/2.8 lens than buying the 100 While the extender multiplies the focal length of a lens by 2x, it will also do the same to the effective f/stop. Because of the reduction in light, AF systems tend to slow down slightly with an extender. The 2x extender will raise your f/stop minimum range by 2 full stops. Your f/4.5-5.6 range will become f/9-11.2.

canon ef 2x iii extender lens compatibility