Google Pixel Camera do have "HALO/Lens Flare Effect "
The 12MP rear shooter on the Pixel might not seem impressive on paper, but it has received rave reviews, with the camera easily challenging the likes of Galaxy S7 and iPhone 7. The camera is not without its issues though, with many customers and reviewers noting a “halo effect” in photos taken under certain lighting conditions.
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The lens flare/halo effect is a pretty common issue that affects the camera of most smartphones when light hits the camera lens at a certain angle. However, on the Pixel, the issue seems to occur way more frequently and can easily ruin the photos taken from the phone.
Responding to a thread on Google product forums about this issue, a Googler “IssacOnCamera” has explained the issue and confirmed that Google is working on a fit despite this seemingly being a hardware issue. He notes that the “halo/arc flare” on the Pixel appear “as a bright/low-contrast arc in the corners of the flame.” Google is working on a fix that uses some advanced mathematical computation which should be bundled in a software update for the device in the next few weeks.
The crew is working on a software fix through HDR+ to mathematically spot these flares and “subtract it from the image. Also, there is no point getting your device replaced thanks to this issue,” said IsaacOnCammera on the Pixel User Community forum. “The Pixel camera’s lens structure is very highly controlled — this means that all Pixels take high-quality images, but it also means all Pixels have the same flare characteristics.”