48mm to 42mm M48-M42 Step-Up Coupling Ring Adapter for Lens Filter Telescope

Made of high-quality Aluminum Alloy material, durable, firm and stable for us to use. It is used for the stereo microscopes to attach a ring light, or change the mounting thread to different size. Designed with long-distance holes for greater use and suitability. It can also be used with adapter ring for M48 to other mount camera body, thus M42 mount lens can be installed onto other mount camera body. M48 to M42 Adapter Ring only, other accessories demo in the picture is not included!