When you're looking to buy a camera, the physical size of the sensor -- not the megapixel rating -- is what you want to keep an eye out for. The larger the better, of course, and while we may never see pocketable full-frame cameras with powerful zoom lenses, some manufacturers are getting close. Sony was the first such camera maker to debut a camera with a 1-inch sensor, the RX100, and now Canon's trying to reclaim some of that high-end point-and-shoot market share with a model of its own. The PowerShot G7 X is Canon's first 1-inch sensor camera, and while it costs a pretty penny ($700), you do get what you pay for.%Gallery-slideshow217852%