H&Y K-Series Holder Mark III (Holder only, no adapters)
The filter system uses metal or magnetic frames compatible with most 150x100mm and 100x100mm filters, including H&Y filters, but can also be used with Lee, NiSi, Formatt Hitech, Kase, and Benro filters. Thanks to the magnetic frame, filters click easily into the filter holder and can be locked in place.
The KH3 filter holders are made from aircraft-grade aluminium, which is exceptionally strong and lightweight. The matt black anodised finish is resistant to corrosion and the elements. Compatible with slot filters of 100x100mm and 100x150mm. No unwanted light leakage, even during long exposures. To prevent the filter from shifting, one side of the guide rail features a screw that locks the filter frame when turned.
The side guides are marked, so you can note or record the exact position of the filter if you need to remove it for any reason, and then reposition it accurately. On the rear of the filter holder there is a slot for 95mm drop-in H&Y filters. This greatly increases the versatility of the system, allowing you to insert an ND filter or a CPL circular polarising filter. Drop-in filters slide into the slot and are held in place by two small pads, which correspond to notches milled into the aluminium frame of the drop-in filter.