This set of images comes courtesy of Google Plus user Adrian Salcu, an early Nexus 5 owner, and focuses on the low-light performance of the two Nexus phones. And the difference is huge.
Even though both the Nexus 5 and the Nexus 4 feature an 8-megapixel camera, you can see just how little this tells about the actual image quality. The difference comes because the two phones use totally different sensors and camera setups. The new Nexus has a larger 1/3.2" sensor and a wider f/2.5 aperture.
The images below are a great illustration of how this results in more light making way into images. The new Nexus also features optical image stabilization and this could be one of the reasons why many of the images below look sharper even in these dim-lit conditions.
Take a look at the camera samples from both the Nexus 5 and Nexus 4 below. Looking in comparison, it seems that the Nexus 5 camera really is a huge leap from the shooter in the Nexus 4, doesn’t it?
source: Adrian Salcu