Nokia is famously known to include Carl Zeiss optics in its smartphones to enhance smartphone photography, but with Nokia X6, company decided to ditch Carl Zeiss and keep things simple. To ensure successful photo, Nokia X6 has a dual camera setup with one 16 MP main sensor with 1.0µm sensor size and a 5 MP depth sensor, having an f/2.0 and an f/2.2 aperture respectively. Main sensor is stabilized through Electronic Image Stabilization (EIS).
In broad daylight, where lighting conditions are good, I found no issues with this camera performance. Photos taken were sharp, well-lit and exposure was on the right side of spectrum. Colors in photos are right, with dynamic range assured to match natural settings with optimal sharpness. It's really hard to find anything to complain about knowing this isn't an expensive phone.
As we change lighting conditions, however, Nokia X6 starts to struggle with photography. Noise is present in every shot with image losing its sharpness. Nevertheless, colors are still respectively in-tact and results are not extremely unpleasant as long as we do not zoom too much into image. There's Portrait Mode available which uses secondary depth sensor to seclude subject from background. It works well, much better than software portrait modes on mid-range smartphones these days. I really appreciate subject to background distance and contours. But again, as compared to top dogs like Google Pixel 2 and Apple iPhone X, portrait mode on Nokia X6 is no match and at this price point, no one should be comparing either.
At front of device, there's a 16 MP sensor with an f/2.0 aperture which does justice to selfies. As expected, result is great in daylight, with deteriorating quality and noise presence in photos in dimly lit environment. Portrait mode is also available at front, but here Nokia uses software based Bokeh implementation to blur background. It works well and fulfil its duty as long as you're not against bright light coming directly at your face.
On video front, Nokia X6 can shoot videos up to 1080p at 30 fps. Sadly, there's no 4K video support available here as that requires a much powerful processor. Videos shot are nothing to get excited about, however, and Nokia X6's competitor Xiaomi Note 5 Pro shoots videos with better exposure and detail than Nokia. At best, it looks like a video taken from an old flagship device of 2016. Worse part about shooting videos on Nokia X6 is that they come out pretty shaky as EIS doesn't perform as good as OIS. Colors, however, look much more natural on videos shot from Nokia X6 as compared to ones shot from Xiaomi Note 5 Pro.
Surprisingly, Nokia X6 does feature a slow-motion mode but Nokia doesn't specify at which frame rate it renders slow-mo videos. Judging by quality, it's nothing impressive and just a gimmick in my opinion.
In the end, I will rate Nokia X6's camera as an average camera at best, with good daylight photography and compromising low-light performance. Even at this midrange price point, there are many other options available with better camera performance than Nokia X6.