Learn how to fix a Canon telephoto lens on YouTube

Canon 100-400mm lens
(Image credit: CamerasLensesEtc / YouTube)

Disclaimer: We don't advise you to take apart your lens. Any repairs done by an unofficial technician will make the warranty invalid – it’s always best to take your gear to a Canon-certified repair center.

The Canon EF 100 - 400mm f/4.5-6.3 IS USM is probably one of the most popular telephotos zooms of all time. Although it has now been superseded by the Canon EF 100 - 400mm f/4.5-6.3 IS II USM, it's still a popular Canon lens among many photographers who haven't made the upgrade.

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Hannah Rooke
Staff Writer

Having studied Journalism and Public Relations at the University of the West of England Hannah developed a love for photography through a module on photojournalism. She specializes in Portrait, Fashion and lifestyle photography but has more recently branched out in the world of stylized product photography. For the last 3 years Hannah has worked at Wex Photo Video as a Senior Sales Assistant using her experience and knowledge of cameras to help people buy the equipment that is right for them. With 5 years experience working with studio lighting, Hannah has run many successful workshops teaching people how to use different lighting setups.