25mm-55mm Adapter Card Metal Adjustable Focus Mount Cards Anti-skidding Focusing Screw Adapters Mounting Tube Camera Accessories

Description: Metal: The adapter is made of metal and is durable. Size range: The length of this spiral tube is 25 mm (minimum) to 55 mm (maximum). Function: This copper core adapter ring can be used to connect the M42 threaded interface lens to the M39 interface side shaft magnifier range camera. At the same time the micro adjustment of 10-15MM/12-19MM/17-31MM/25-55MM can be realized. The thread pitch of M39 and M42 is 1MM. For example the adapter L39 cannot focus and focus infinitely. Suitability: This spiral tube is suitable for those lenses without a focusing ring. It can be used as a lens tube and provide fine focusing control for macrophotography. Installation: First connect your M42 lens to this tube. Then connect the lens and spiral tube to your M39 camera. Specification: Material: metal Color: as shown Size:Approx.6x6x3 cm/2.36x2.36x1.18 inches. Package Includes: 1 Piece M42-M39 25-55mm Focusing Screw Adapter.