Features: brand new and high quality Full manual operation, manual for focus, manual exposure, aperture priority exposure The M42x0.75 thread is divided into an inner ring and an outer ring with a double-layer structure. The relative positions of the inner and outer rings are fixed with 3 screws, which can easily adjust the camera angle. Made of aluminum alloy, which does not damage the telescopes thread, and the 2-layer thickened aluminum alloy is very firm. This adapter gives you the ability to use your irreplaceable prime lens and saves you the cost of purchasing new lenses. The adapters are precision made to insure the perfect fit. Specifications: Material:Aluminum Alloy Color:Black Application: Suitable for T2 telescopic lens/folding lens to M42 screw body Package Includes: 1x Lens Adapter Ring note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.