Kase K9 Kit – 100mm Holder & Slim Magnetic Polarising Filter


Kase K9 Filter Holder Kit – New and improved 100mm Holder & Slim 90mm Magnetic Polariser

The new generation Kase K9 100mm filter holder kit comes complete with a durable yet lightweight precision crafted CNC aviation grade aluminium holder, a slim 90mm magnetic circular polariser and four metal adaptor rings (77mm Geared Adaptor Ring, 82mm Geared Adaptor Ring, 67-82mm step-up, 72-82mm step-up rings).

One of the main benefits of the Kase filter system is that the polariser sits at the rear of the system (closest to the front lens element). This ensures that there is no vignette when using up to three filters in the holder, even on 14mm lenses on a full frame camera. There are also no reflections of the metal holder in the lens glass element too.

The polariser is also magnetic which is a far superior option to the screw on systems from certain other brands. It also allows the polariser to be attached and removed extremely quickly, easily and with confidence that it will stay in position without falling. There is no light leakage too as the polariser sits within the metal adaptor ring ensuring a tight fit and in order to rotate the polariser, you simply turn the red metal cog that is located on the side of the filter holder.

The holder has a side mounted locking screw to ensure that it sits exactly where placed on the metal adaptor ring and this ensures that accidental removal of the holder is eliminated. There are 2mm deep guide rails fitted to hold up to two filters with an extra one included in the box (and extra deep screws too) for you to add should you wish to run three filters.

The Kase K9 filter holder is compatible with 100mm filters from most other brands.

What’s in the box?
Kase K9 100mm Filter Holder
90mm Slim Magnetic CPL (circular polariser filter)
77-90mm Magnetic Geared Adaptor Ring
82-90mm Magnetic Geared Adaptor Ring
67-82mm Step Up Ring
72-82mm Step Up Ring
2mm and 1.1mm filter slots – 2mm fitted as standard
Filter slot screwdriver & 4 x extra-long screws
1 x spare foam gasket (applied directly onto the holder, not the filters)


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