This adapter rings is perfect for attaching M42 lens to microscopes, facilitating detailed observations in scientific research, educational setting, or intricate hobbyist projects Transform your M42 lens into tool with our M42 to C Mount Adapter Rings, a must for enthusiasts and professional Enhances your optical equipment ' s functionality with our black finished adapter rings Craft from aluminum alloy using machining technology, this adapter ensures accuracy For microscope users, hobbyists, and optical experimenters look to expand their lens option without compromising on or, Manufacturer: LIzogli