http://wccftech.com/pixel-2-camera-dxomark-in-depth-look/

Though the Pixel 2 and Pixel 2 XL feature a single lens at both sides of their aluminum chassis, their prowess can ultimately be viewed thanks to the DxOMark score of 98, which overtakes the capabilities of the iPhone 8 and iPhone 8 Plus camera. Still, what is the magic behind the hardware and software synergy that allows Google to incorporate such level of optics in its latest flagship family? Let us find out.

According to Google, requiring a telephoto lens is not going to be necessary because combining the camera hardware and software magic, users are able to take ‘DSLR-level’ images by blurring the background and making the foreground appear more prominent. Normally, it would require you to accomplish this with two camera lenses, but Google states that it uses a new sensor that delivers better dynamic range.