Medical Optical coupler, 1.f=16mm 2.waterproof, standard C mount. 3.HD=1920*1080 4.fit to all brands of rigid endoscopes We are a professional manfacture of optical couplers more than ten years, standard C-mount and waterproof, fit to all brands of rigid endoscopes:1. focal length:16mm2. clear image,3. transmissivity>90%,4. waterproof.5. mount: standard C mount6. resolution: 1920*1080Welcome to ...