The better the native performance of your lens, the better the results of the Extender. Note that not all lenses will accept an Extender. For more information of which lenses are compatible, consult the Canon and Wikipedia webpages on this subject.. EF 2x Extender with the EF 100-400mm f/4.5-5.6L IS II USM lens on the EOS R6 camera.. As to the 2X, I have some of the sharpest glass Canon has made (200 f2, 300 and 400 f2.8) and in my experience the 2X results in an excessive loss of sharpness, contrast, and overall image quality. It is a great device for turning an excellent quality lens into image results like that from a much lesser quality lens. I don't believe any Canon EF teleconverters are compatible with EF-S lenses. Only Full Frame EF lenses are. But not any EF-S lenses. For the OP if it's in your budget look into any of the Canon EF 70-200mm F/2.8L IS series lenses. Canon has released 3 revisions of the stabilized version. Box Dimensions (LxWxH) 9.6 x 4.8 x 4.6". Buy Tokina SZX 400mm f/8 Reflex MF Lens with 2x Extender Kit for Canon EF featuring EF-Mount Lens / Full-Frame Format, Fixed Aperture: f/8, Catadioptric Telephoto Lens, Manual Focus, Multicoating and Antioxidant Coating, Close Focus: 45.3", Front Filter Size: 67mm, 2x Extender. Review Tokina null. There are two lenses that do work well with a 1.4x tel-con. Never the 2x however. The ef 70-200mm f2.8L and the ef 300mm f4l IS. The nice thing about the 300mil is it has the IQ to give up, but it becomes a 4200mm f5.6 lens with IS. Canon's fantastic and unique ef 400mm f5.6L does not have IS. So the converted 300mil is a good give and take. EF Lens comparability for top FPS. Jul 22, 2020. So the R5 will offer a maximum of 12 FPS mechanical shutter & 20 FPS electronic shutter, however apparently this will vary on what EF lens & aperture etc is connected. I cannot see anywhere on the Canon website which states what EF lenses will get the top FPS and what other lenses are expected to In 2020 Canon also announced Extenders for the R system – the Extender RF 1.4x and Extender RF 2x. These high performance Extenders multiply the effective focal length of the lens to which they are attached by 1.4x or 2x. So, for example, a 400mm lens becomes 560mm with a 1.4x Extender, and 800mm with a 2x Extender. yHow.
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    • canon extender ef 2x compatible lenses