Topic » Rokinon Xeen 85mm T1.5 for Canon


Testing Lenses: Best Individual Focus MTF Curves


OK, in the last post we did something useful, but rather boring: we looked at how MTF changes when lenses are stopped down. Today we’re going to use a more powerful optical bench tool, the MTF vs. Field vs. Focus. Unless you work in a metrology lab (and probably not even then, very few are performing […]

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