This 100 mm K‑Series Filter Holder from H&Y Filters allows for the convenient use of separately available 100 mm‑wide, 2 mm‑thick filters, along with a separately available circular polarizer filter.
The 100 mm K‑Series Filter Holder comes assembled to accommodate 100 mm‑wide filters that each have a separately available H&Y Filters Quick‑Release Magnetic Filter Frame installed on them. A Quick‑Release Magnetic Filter Frame is designed to reinforce the edges of one separately available 100 × 100 mm or 100 × 150 mm, 2 mm‑thick filter while enabling its use with the filter holder. When installed along the sides of a filter, these magnetic filter frames help eliminate or limit stray light—as well as enhance filter rigidity and flatness—thereby promoting sharp results.
Filters each with a Quick‑Release Magnetic Filter Frame can be magnetically stacked in front of a camera lens instead of inserted into specified filter‑holder slots, giving the user flexibility in the number of filters used and allowing quick installation, repositioning, or swapping to suit subjects or changing lighting conditions.
The aluminum‑alloy filter holder is pre‑installed with one pair of magnetic filter slots that use a single set screw to fasten one filter with a Quick‑Release Magnetic Filter Frame in between them. Loosening or tightening this screw varies the grip on the inserted filter—especially useful when using a graduated filter that may need sliding for creative control. Additional filters with Quick‑Release Magnetic Filter Frames can then be magnetically stacked on top.
Installation of a Quick‑Release Magnetic Filter Frame onto a compatible filter involves removing the paper backing from the rear adhesive on its four sections. The side pieces are attached first to the corresponding filter side, followed by top and bottom sections that snap securely into place.
To use the filter holder: first screw one of the included adapter rings (67 mm, 72 mm, 77 mm, or 82 mm) onto your lens. Step‑up rings may be used if needed. After mounting, the two adapter‑ring retaining screws allow the filter holder to rotate 360°—great for positioning graduated ND or other filters precisely.
The 100 mm K‑Series Filter Holder also accepts a separately available drop‑in circular polarizer filter, mounted within a geared aluminum‑alloy filter ring with an external dial for independent rotation to adjust polarization. When not in use, a snap‑on cap covers the accessory slot to prevent stray light from affecting exposure.
Key Features:
Durable aluminum‑alloy construction with pre‑installed magnetic filter slots; compatible with 100 mm‑wide, 2 mm‑thick filters (with Quick‑Release Magnetic Filter Frames installed)
Magnetic stacking of filters allows flexibility in filter usage and quick swaps
Front-facing center finder rulers on magnetic slots enable precise filter positioning
Supplied adapter rings (67 mm, 72 mm, 77 mm, 82 mm) allow attachment to lens; compatible with step‑up rings
360° rotation capability enhances creative control with graduated filters
Built‑in front gasket helps prevent stray light intrusion
Accommodates a drop‑in circular polarizer (separately available), with external dial for independent rotation
Snap‑on cap provided to block stray light when polarizer isn’t used
Nylon pouches included for storage of the holder, adapter rings, snap‑on cap, and polarizer.
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