Urth Magnetic Circular Polarizing (CPL) Lens Filter (Plus+) review

Excellent polarizing powers but I have mixed feelings about the magnetism

Urth CPL filter held between two fingers
(Image: © Gareth Bevan / Digital Camera World)

Digital Camera World Verdict

Optically the Urth 82mm Magnetic CPL Lens Filter (Plus+) is superb at performing a clearly visible polarisation effect, whilst maintaining the maximum image quality of the lens it is attached to. However, I am torn on the magnetic connection – very useful for whipping the filer on and off, if that is something you do a lot, but twisting the filter is more imprecise compared to the screw-in version, and produces an unpleasant scraping noise.


  • +

    Strong polarizing powers

  • +

    No effect on lens clarity

  • +

    Magnetic filters quick to change

  • +

    Slick minimal design


  • -

    Magnetic connection is secure, but not impervious to falling off

  • -

    Scraping sound when turning the filter

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You might be more familiar with polarized lenses from shopping for sunglasses, but circular polarising lens filters (or CPL filters) for camera lenses are one of the most useful accessories in any photographer's kit bag. No matter what you shoot, you might well find a polariser has a benefit to your image in one way or another.

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Filter TypeCircular Polarizer
Available sizes37mm, 39mm, 40.5mm, 43mm, 46mm, 49mm, 52mm, 55mm, 58mm, 62mm, 67mm, 72mm, 77mm, 82mm, 86mm, 95mm, 105mm, 112mm, 127mm
Coatings Nano Coating 20-Layers
Glass German SCHOTT B270
Density 0.4 (-1.3 f-stops)
Effect Cuts reflections. Boosts Contrast
Thickness 8mm with magnetic holder

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Gareth Bevan
Reviews Editor

Gareth is a photographer based in London, working as a freelance photographer and videographer for the past several years, having the privilege to shoot for some household names. With work focusing on fashion, portrait and lifestyle content creation, he has developed a range of skills covering everything from editorial shoots to social media videos. Outside of work, he has a personal passion for travel and nature photography, with a devotion to sustainability and environmental causes.