Feature 1 High precision machining, ensures smooth installing and dismantling, can protect both lens and camera body. 2 No lens, no electronic contact, it won't affect the optical quality of lens and sensitivity of camera. 3 Supports focus to infinity, manual focus, manual aperture and manual exposure, aperture priority. 4 Applicable for M42 mount lens. Suitable for Sony NEX mirrorless camera. 5 Save your money instead of buy a new lens, cost-efficient accessory for photography lovers.Features: High precision machining, ensures smooth installing and dismantling, can protect both lens and camera body. No lens, no electronic contact, it won't affect the optical quality of lens and sensitivity of camera. Supports focus to infinity, manual focus, manual aperture and manual exposure, aperture priority. Applicable for M42 mount lens. Suitable for Sony NEX mirrorless camera. Save your money instead of buy a new lens, cost-efficient accessory for photography lovers. Specifications: Material: Aluminum alloy Color: Black Compatible Lens: For M42 mount lens Compatible Camera: For Sony NEX mirrorless camera Package List: 1 * Lens Adapter