You get you what you pay for with the Canon EF 200-400mm f/4L IS USM Extender 1.4X: superlative performance and flexibility.
After a multiday delay that irked users, Apple has released a system software update for OS X Mavericks that fixes what's become known as the "gotofail" security vulnerability.
A malicious monitoring app could log the keystrokes and touch input on your iOS device, say security researchers.
Astronomers at the Chandra X-ray Observatory explain why the black hole at the heart of the Milky Way galaxy doesn't consume everything in sight.
Programmers who used plug-ins to invoke third-party software like password managers get a replacement technology built directly into Chrome 29.
The ability to measure the distortion of space and time near the supermassive black holes lurking at the hearts of many, if not all, large galaxies may give astronomers a new tool for studying galactic evolution.
Photos purportedly showing Nokia's photo-centric new smart phone have emerged, teasing a huge camera unit.
Developer finds vulnerability in Exynos 4-powered devices, including the Galaxy S2 and Galaxy Note, that bypasses system permissions, letting data be extracted from RAM or malicious code be injected.
A rare distorted supernova explosion leads scientists to believe they may be witnessing the birth of a black hole for the first time ever.
Cybercriminals have already taken advantage of the latest security hole in Adobe Reader and Acrobat.