Canon switchable teleconverter goes from 1.4x to 2x – will feature in the RF 300mm?

Canon switchable teleconverter toggles between 1.4x and 2x – could be built into an RF 300mm lens?
(Image credit: Japan Patent Office)

Canon has been hard at work designing a teleconverter for its new RF mount. This won’t be a standard converter, though – rather than having a fixed magnification, this one will be switchable between two different ranges. 

Teleconverters usually come in two common varieties, 1.4x (which would turn, for example, a 300mm lens into a 420mm lens) and 2x (which would turn a 300mm lens into a 600mm lens). Canon’s unique new teleconverter, however, is designed to toggle between both magnifications. 

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James Artaius

The editor of Digital Camera World, James has 21 years experience as a journalist and started working in the photographic industry in 2014 (as an assistant to Damian McGillicuddy, who succeeded David Bailey as Principal Photographer for Olympus). In this time he shot for clients like Aston Martin Racing, Elinchrom and L'Oréal, in addition to shooting campaigns and product testing for Olympus, and providing training for professionals. This has led him to being a go-to expert for camera and lens reviews, photo and lighting tutorials, as well as industry news, rumors and analysis for publications like Digital Camera MagazinePhotoPlus: The Canon MagazineN-Photo: The Nikon MagazineDigital Photographer and Professional Imagemaker, as well as hosting workshops and talks at The Photography Show. He also serves as a judge for the Red Bull Illume Photo Contest. An Olympus and Canon shooter, he has a wealth of knowledge on cameras of all makes – and a fondness for vintage lenses and instant cameras.