Just like with any 2x teleconverter, the focal length of the attached lens is doubled, with a consequent aperture reduction of two f/stops. As such, a 70-200mm f/2.8 zoom effectively becomes roughly a ...

As a 1.4x teleconverter, the focal length of the attached lens is magnified by a factor of 1.4x, with a 1 f/stop reduction in aperture rating, so a 70-200mm f/2.8 zoom effectively becomes roughly a ...

Canon's EF 200-400 lens delivers terrific optics and unmatched zoom flexibility with an innovative built-in 1.4x telephoto extender. Stephen Shankland Former Principal Writer Stephen Shankland worked ...

Highlighting Canon’s ongoing commitment to the EOS R System and the RF Mount, today’s additions, alike the rest of the RF line-up, take advantage of the System – enabling photographers to experience ...

Canon U.S.A. Announces the Availability of the Versatile EF 200‐400mm F/4L IS USM Extender 1.4x Super-Telephoto Zoom Lens Award-Winning Photographer Shares First-Hand Experiences with the EF 200-400mm ...

Canon have launched four new RF lenses and two RF extenders today, bringing telephoto capabilities to the RF line-up as well as additional portrait and macro photography creative possibilities. The ...

Images, and the devices that capture them, are my focus. I've covered cameras at PCMag for the past 14 years, which has given me a front row seat for the changeover from DSLRs to mirrorless cameras, ...