http://www.imaging-resource.com/news/2016/02/08/the-perfect-lens-doesnt-exist-and-getting-close-to-perfect-is-expensive

http://www.lensrentals.com/blog/2016/02/optical-quality-assurance


Do you see it? I’m not sure:
http://petapixel.com/2016/03/14/problem-modern-lenses/
http://yannickkhong.com/blog/2016/3/7/sigma-art-vs-nikkor-afd-part-1

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