Adapter Ring Model Number: Adapter Ring Color: 40 to 28 Description A precision stepdown adapter ring that converts a 40 to 28 thread interface, allowing you to mount 28 mm threaded accessories onto devices with 40 mm threads. Made from quality materials for durable, stable performance and long service life. Key benefits Simple conversion: lets you use 28 mm filters, caps, hoods, and other threaded accessories on equipment with 40 mm threads. Reliable fit: accurately machined threads provide a secure, wobble connection for consistent results. Durable construction: built from quality materials to withstand repeated mounting and removal without deforming. Saves cost and space: avoids buying duplicate accessories by enabling crosscompatibility between different thread sizes. Features and specifications Function: stepdown adapter ring for converting 40 thread size to 28 thread size Compatibility: fits any equipment using 40 threaded mount and 28 threaded accessories Size reference: 40 to 28 thread conversion Material: quality, longlasting material that maintains thread integrity and performance Performance: stable connection, easy screwon installation, maintains accessory alignment Practical use scenarios Photography filters: attach a 28 mm ND or polarizing filter to a lens or device that has a 40 mm front thread to achieve desired exposure or contrast control without buying filters. Lens caps and hoods: use an existing 28 mm cap or hood on gear with 40 mm threads to protect optics and reduce stray light while keeping gear compact. Small accessory integration: mount 28 mm macro lights, extension tubes, or adapters on instruments with 40 mm threads for custom optical setups in field or studio work. Installation tips Align threads carefully and turn clockwise to engage. Do not force if resistance is felt; back off and realign. Check for tightness before use to ensure a secure fit during operation. Clean threads periodically to remove dust and debris and preserve smooth engagement. What makes this adapter ring stand out Straightforward onepiece solution for a common thread mismatch Precision threading and durable material deliver consistent, longterm performance Broad compatibility with a wide range of threaded accessories, reducing the need for duplicate items This Adapter Ring provides a simple, reliable way to expand compatibility between 40 and 28 thread sizes while maintaining stable performance and longterm durability.