The Canon RF 200-800mm f/6.3-9 IS USM is the reigning superzoom champion in terms of focal range and is impressively lightweight and compact for its reach. However, its mediocre maximum aperture does ...

Canon Inc. is a Japanese multinational corporation specializing in the manufacture of imaging and optical products, including cameras, camcorders, photocopiers, steppers, computer printers and medical ...

贾义涵 清晨的高铁上，车厢内人流如潮，繁忙的春运返程高峰期已然拉开序幕。在G2811次列车上，乘警刘海霞正忙碌地进行 ...