If you remember the iPhone 6 had an issue where the post processing algorthim tried to reduce noise so much there was a water color style smearing if you zoomed in on images. The iPhone 6s seemed to have fixed this issue. The iPhone 7+ has brought this issue back. Any and all images taken even in good light appears smeared upon zoom with the latest and greatest. Hopefully Apple will fix the post processing algorithm with the first iOS 10 updates.