It's a telephoto prime with a built-in teleconverter, letting photographers switch between two focal lengths in seconds. Here ...

Tamron is exploring the ultra-fast standard zoom market, but with a design that promises prime-like brightness in a smaller, lighter and more affordable package ...

Abstract: With the extensive deployment of electronic information systems in modern RF integrated platforms, the issue of co-site, co-channel, or adjacent-channel interference has become increasingly ...