From enthusiasts to high-end professionals, the new drop-in filter holder system for the needs of landscape photographers, the M10 series adapter ring The M10 filter holder can be installed with one touch by attaching the adapter ring to the lens filter mounting screw Made of aluminum, strong and durable, suitable for heavy duty applications Compatible Lens Diameter: 2.3 inches (58 mm) This product is only the adapter ring and the filter holder is not included From enthusiasts to high-end professionals, the new drop-in filter holder system for the needs of landscape photographers, the M10 series adaptor ring. Only for use with Haida M10 filter holder. This is the adapter ring only. Filter holder must be purchased separately. What is the M10 Filter Holder System? The M10 filter holder makes filtering shooting quick and easy. Simply install the adapter ring that fits your lens aperture first, then install the holder, insert the round or square filter, and you're done. Especially round filters are easy to install and remove with a "drop-in" system that does not require screws. Fits lenses with filter diameter of 52mm-82mm.