The Haida 82mm NanoPro Multicoated Circular Polarizer is designed for use with the Haida 100-Pro Series Filter Holder (included with this kit!). The Circular Polarizer attaches to the holder by way of the main adapter ring (included with the Haida 100-Pro Series Filter Holder), and sits in the round opening of the filter holder, allowing you to use the filter slots for drop in filters. Once attached to the Haida 100-Pro Filter Holder the Circular Polarizer can rotate up to 100 degrees, allowing you to increase or decrease the effect in your images.The NanoPro Multicoating is applied to both sides of the filter, making for an easy to clean, high quality Circular Polarizer that can help to reduce reflections and glare from non-metallic surfaces, such as the reflection of the Sun on water. Made from high quality aluminum, the Haida 100-Pro Series Filter Holder is designed to hold up to three 2mm thick filters (100x100mm or 100x150mm) at a time. The Haida 100-Pro Series Filter Holder contains a main adapter ring that attaches to the filter holder, allowing you to attach the Haida 100-Pro Series 82mm NanoPro Circular Polarizer (included in this kit!) in the round opening in the middle of the filter holder. Once attached, the Circular Polarizer can rotate up to 100 degrees, allowing you to remove remove reflections and glare from non-metallic surfaces, such as water. The Haida 100-Series Pro Filter Holder requires Haida 100-Pro Adapter Rings (included in this kit!) and is not compatible with the original Haida 100 Series Adapter Rings. The newly redesigned 100-Pro Filter Holder allows for greater flexibility and creative possibilities, making it one of the highest quality filter holders available for use with 100mm filters.