Professional medical optical coupler, connect rigid endoscopes with HD camera, standard C-mount and waterproof, clear imag Professional medical optical coupler, connect rigid endoscopes with HD camera, get clear image: 1. focal length: 13mm2. mount:standard C-mount3. waterproof4. high resotution: 1920*1080 We are a professional manufacture of endoscope couplers more than ten years. Welcome to ...