• 0.71X Optical Focal Reducer: When this adapter with high-quality optical lens is attached to a camera, the crop factor is reduced to 0.71x
• Flange Locking: The adapter has a threaded flange-locking structure which is robust and reliable. The lens will not shake after installation
• Focus to Infinity: Advanced CNC processing and professional assembly technology ensure product quality
• Aluminum Alloy: The adapter is made of aluminum alloy with high strength and low density
• NOTE: If the camera prompts that no lens is attached or that the shutter can't be pressed, please set "Release without lens" to ON in your camera Menu;Only manual focus