![]() However, newer EOS cameras such as the EOS 77D, EOS 90D and EOS 7D Mark II and professional-level cameras such as the EOS 5D Mark IV and EOS-1D X Mark III allow autofocusing at maximum apertures of f/8.Īll lenses in Canon's EF lens range have a maximum aperture of f/5.6 or wider, so all EF-mount cameras will autofocus with any autofocus lens. On many DSLR cameras, autofocus stops when the maximum effective aperture drops below f/5.6, regardless of the amount of light available. With the reduction of the maximum aperture, a side effect of this is that there is the possibility of the loss of autofocus when using an Extender with DSLR cameras. In the same way, the EF 70-200mm f/4L IS II USM lens has a maximum aperture of f/4, but with a 1.4x Extender, the effective maximum aperture becomes f/5.6, while with a 2x Extender it becomes f/8. If you use the same lens with a 2x Extender, it becomes a 140-400mm f/5.6 lens. If you attach a 1.4x Extender to an EF 70-200mm f/2.8L IS III USM lens, for example, it will become in effect a 98-280mm f/4 lens. This means you gain extra focal length at the expense of losing some light. The 1.4x Extender causes a decrease of one stop in the maximum aperture of the lens, while the 2x Extender causes a loss of two stops. But using them to increase focal length comes at a cost − reduced maximum aperture. It is not physically possible to use the Extender at the lower end of the lens's zoom range.)Įxtenders are a relatively cheap and convenient way of enhancing your telephoto capability. (In the case of the RF 100-500mm F4.5-7.1 L IS USM, you need to zoom to at least 300mm in order to move the rear optical elements enough to fit an RF Extender. Compatible lenses have a recessed rear element, which creates space for the front element of the Extender. This is because of their construction – extenders have a protruding front element that will not fit into the rear of many EF lenses and some RF lenses. Not all Canon lenses accept Canon Extenders. If you're using RF lenses, you need Canon RF Extenders, which are designed to work with certain RF lenses – more about these shortly. They can be used with a compatible EF lens on a Canon EOS R System camera with an EF-EOS R Mount Adapter. They do not work with EF-S or EF-M lenses. As the names suggest, the 1.4x Extender increases the focal length of your lens by a factor of 1.4, and the 2x by a factor of 2.Ĭanon EF Extenders are designed for use with a number of telephoto and zoom EF lenses. Canon Extenders are available in two strengths, 1.4x and 2x. View EOS VR System View EOS VR System Įxtenders, generally known as teleconverters, increase the effective focal length of lenses.PTZ cameras help live events company switch to hybrid PTZ cameras help live events company switch to hybrid .Showcasing the beauty of biodiversity with PTZ and Projectors Showcasing the beauty of biodiversity with PTZ and Projectors .Redefining TV Broadcast with PTZ Cameras Redefining TV Broadcast with PTZ Cameras .View Pro Video Solutions Professional Video Solutions .Public sector organisations the world over trust Canon for their monitoring, surveillance and production needs. Government and Public Sector Government and Public Sector Government and Public Sector.Capture, control and deliver superb quality content with Canon’s imaging eco system. Professional AV and Streaming Professional AV and Streaming Professional AV and StreamingĬlose the distance with unrivalled clarity.When the world is watching, our pioneering range of broadcast-quality products offers cutting-edge performance. When creativity counts, filmmakers choose Cinema EOS for exceptional image quality and control. Unleash your ambition and make the whole world cinematic. Ink, Toner & Paper Ink, Toner & Paper .Use Canon consumables to ensure optimum performance and superb quality with every print. Ink, Toner & Paper Ink, Toner & Paper Ink, Toner & Paper.Take complete creative control of your images with PIXMA and imagePROGRAF PRO professional photo printers. ![]() Professional Photo Printers Professional Photo Printers Professional Photo Printers.MegaTank Printers MegaTank Printers MegaTank PrintersĮnjoy high quality performance, low cost prints and ultimate convenience with the PIXMA G series of refillable ink tank printers.Get productive with a range of small office printers that are your ideal companions. Small Office Printers Small Office Printers Small Office Printers.Home Printers Home Printers Home Printersįunctional and stylish home photo printers and all-in-ones delivering quality results.
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