PolarPro is an American filter company offering products for many different types of cameras, including high-end still cameras, video-centric cameras, action cameras and drones. They also make other accessories, such as mounts and cases. I recently had the chance to shoot with two products from the company’s QuartzLine filter series: a Cinema Series circular polarizer and an ND16 solid neutral density filter.
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https://www.imaging-resource.com/articles/polarpro-quartzline-filter-review
