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 ...

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, ...

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 ...

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 ...

We spend a day shooting aeroplanes with Andy Rouse to test the new Canon EF 200-400mm f/4L IS USM Extender 1.4x lens. The Canon EF 200-400mm f/4L IS USM Extender 1.4x is a professional quality ...