M42-m42(25-55) M42 To M42 Mount Lens Focusing Helicoid

Descripción

Features:Suitable for M42 mount lens without focusing ring.Can be used as a macro extension tube.No electronic element manually controls aperture and focusing.Aluminum alloy material CNC precision machining durable and sturdy.Easy to install and simple to use.Specifications:Material: Aluminum AlloyLens Compatibility: M42 screw mount lensLength: 17mm-31mm/ 25mm-55mm/ 36mm-90mm(optional)Packing List:1 * Adapter Ring