Marumi M100 100mm Magnetic Filter Holder

Marumi’s use of magnets in its M100 holder means it's very quick and easy to swap between different filters

Marumi M100 Magnetic Filter Holder review
(Image: © Angela Nicholson / Digital Camera World)

Digital Camera World Verdict

The Marumi 100mm Magnetic Filter Holder (M100) feels great, like it will last a lifetime, and the magnets do a great job of holding square and rectangular filters. Unfortunately, however, Marumi hasn’t extended the magnetic system to the polarising filter. And while the holder’s mount is secure, it’s not the fastest system to use out in the field.


  • +

    Strong magnets keep square filters in place

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    Metal construction

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    Graduation marks help with filter positioning


  • -

    The polarizer filter isn’t magnetic

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    The holder is fiddly to mount and unmount

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    Requires framed filters

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It may not be the best-known filter manufacturer but Marumi has been in the optics industry for over 85 years. It produces a huge range of filters with screw-in, round magnetic, and square filter options. The company’s square and rectangular filters are produced in collaboration with H&Y and feature an H&Y frame that allows them to be mounted in the Marumi 100mm Magnetic Filter Holder (M100).

As well as the standard graduated neutral density (ND) filters, Marumi offers more exotic options like reversed graduated ND and center graduated ND filters which can be useful when photographing sunset or sunrise.

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Angela Nicholson

Angela has been testing camera gear from all the major manufacturers since January 2004 and has been Amateur Photographer’s Technical Editor and Head of Testing for Future Publishing’s photography portfolio (Digital Camera MagazinePhotoPlus: The Canon MagazineN-PhotoPractical PhotoshopPhotography Week and Professional Photography magazines, as well as the Digital Camera World and TechRadar websites). She is the founder of SheClicks - a community group that encourages and supports female photographers.