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 ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Canon has introduced the newest member in its HDgc Series of portable HD zoom lenses. The new ...

Teleconverters provide an affordable way to increase the focal length of a lens – but should you buy one? Teleconverters have been around for a long time and continue to be available because they’re ...

20x Portable 2/3-Inch HD Zoom Lens With Built-In 2x Extender Provides Superb Optical Performance and Operational Features, and a Redesigned Advanced Drive Unit Canon has introduced the KJ20x8.2B ...