Features: Transform your M42 lens into tool with our M42 to C Mount Adapter Rings, a must for enthusiasts and professional. 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 quality or performances. This adapter rings is perfect for attaching M42 lens to microscopes, facilitating detailed observations in scientific research, educational setting, or intricate hobbyist projects. Enhances your optical equipment's functionality with our black finished adapter rings, minimal impact on your setups balance and handling. Specifications: Inner Thread: M42x0.75mm Material: Aluminum Size: As Shows Package Includes: 1pc Microscope Lens Adapter note: Please allow 1-2cm errors due to manual measurement. Due to difference between different monitors, the picture may not reflect the item actual color.