This article is part of our roundup of iPhone camera lenses.
Macworld last comprehensively tested iPhone add-on lenses in 2014. In this update, I called in the leading iPhone lens systems, and tested them over several days of shooting the same scenes for comparison along with different scenes to highlight strengths and weaknesses.
I tested each system with an iPhone 6s, which has an f/2.2 aperture, 29mm (35mm equivalent) focal length, and 12-megapixel camera system. The same system is found in the iPhone 6s Plus and iPhone SE, as well as the 9.7-inch iPad Pro.
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