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 ...

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 ...

A leaker has claimed that Apple is testing an add-on lens for its iPhones. But why hasn't Samsung adopted this just yet?

It's a telephoto prime with a built-in teleconverter, letting photographers switch between two focal lengths in seconds. Here's how it works and what we know ...

The phone is rumored to feature dual telephoto cameras. Oppo’s camera-focused flagship, the Find X9 Ultra, is rumored to launch in March. Although ...