Surgical lnstrument_optical coupler,
1. focal length=27mm
2. standard C-mount and waterproof
3. high resolution:1920*1080

Professional Medical Surgical lnstrument_optical coupler, standard C/CS mount and waterproof, fit to all brands of rigid endoscopes.

Generally, for ENT endoscopes, arthroscopy, hysteroscope together with 1/2 inch CCD camera, 27mm coupler is better; for laparoscope together with 1/3 inch CCD camera, 27mm is better.

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