I Spy This Subtle Hidden-Camera Pen That's on Sale Right Now This sleek, metal rollerball pen discreetly records 2K HD video and clear audio with a single click, and is great for discreetly recording ...

A big advantage of these Four-Thirds cameras is that you gain the ability to swap lenses like you can with an SLR — but in a much smaller, lighter and generally more portable package. Olympus says ...