The 1.4x EX DG and 2x EX DG are dedicated APO teleconverters, mounted vetween specific lenses and the camera body to increase focal length by the power of 1.4 or 2. Digitally optimised, the two new ...

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 ...

The Mark III edition of this Canon 1.4x Extender, or teleconverter, is the latest (and probably last) in the EF-mount series, designed for Canon cameras and compatible EF-mount Canon telephoto lenses.

RONKONKOMA, NY--(Marketwired - Feb 19, 2016) - Sigma Corporation of America, a leading DSLR lens, camera, flash and accessory manufacturer, today announced two new Global Vision Lens bundles: the ...

Looks like Canon is preparing one of its most versatile professional telephoto lenses yet. A newly published patent suggests Canon is developing an RF 300mm f/2.8 L IS USM with a built-in 1.4x ...

The new Sigma TC-1411 teleconverter increases the focal length of L-mount lenses by 1.4x, and the TC-2011 by 2x. They are compatible with the new 100-400mm F5-6.3 DG DN OS Contemporary lens. The Sigma ...

Judging from the technical questions we get from readers, there is a lot of misinformation about teleconverters floating around the internet (no surprise). Here are some answers to those questions… ...