Adapter ring for M42 series lens to Sony E series body. Fully manual control, the shape is stable, not easy to slip and safer. Precise alignment, easy installation and disassembly. The connection ring and bayonet are tightly and smoothly combined, and there is no loose phenomenon. Perfect high-precision transfer, ring body made of aluminum-magnesium alloy, durable, comfortable and smooth operation with the ability to focus to infinity.