Kase Wolverine Series K9 Filter Holder review

Kase’s 100mm K9 filter holder is well made, easy to use and relatively affordable. What’s not to like?

Kase Wolverine Series K9 Filter Holder review
(Image: © Angela Nicholson / Digital Camera World)

Digital Camera World Verdict

Kase’s aviation-grade aluminum filter holder has a high-quality feel yet is lightweight and fairly low-profile. Once the holder is in place, it’s easy to attach the magnetic polariser and it can be rotated into the desired position without touching the filter or moving the whole holder.


  • +

    Lightweight metal construction

  • +

    Kit includes a magnetic polariser

  • +

    Accepts a wide range of 100mm filters


  • -

    Including the polariser increases the cost

  • -

    Lee Filters filters don’t thread as smoothly as Kase’s

  • -

    The holder clip isn’t sprung

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Kase offers an extensive range of filters with everything from 150 x 170mm filters to rear-mounted filters that slot into the back of some lenses. There’s also a choice of circular magnetic filters and square or rectangular filters that slot into one of the company’s holders.

There are two different-sized filter holders in Kase’s range, a small one for 75mm-type filters that are suited to small mirrorless cameras and two holders that are designed for 100mm-type filters. These are the Kase Wolverine Armour 100mm Filter Holder system that has magnetic frames to surround 100mm rectangular filters and the more widely known Kase Wolverine K9 100mm Filter holder reviewed here.

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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.