<https://blog.sigmaphoto.com/2017/sigma-100-400mm-vs-150-600mm/400mm-macro-1500/>
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"2017-06-16T19:35:25+00:00"^^<http://schema.org/Date>
<https://blog.sigmaphoto.com/2017/sigma-100-400mm-vs-150-600mm/400mm-macro-1500/>