Check the listing for details. Pentax Flexible Endoscope Coupler Adapter Gastroscope Bronchoscope C-Mount Lens. Condition: New. Listed at 299.00 USD. Specifications:1. Focal Length: Different focal lengths are available for all video formats2. Optics: Custom flat-field triplet optical design; broadband anti-reflection lens coatings3. Eyepiece Interface: Quick connect mechanism for one-handed operation; Electrically insulating non-mar eyepiece interface4. Focus: Ergonomic focus ring with extended range for both single-chip and 3-chip CCD's.5. Good waterproof and air-tightness design to reach the soakable and immersiblefunctions for easy cleaning and sterilization.6. Special treatment inside of the coupler to reduce the air, which makes it not easy to be fogged.7. Improved the noise light elimination by special design. A nice center of the optical system has been improved to ensure thegood image quality.8. Standard C or CS mount design, compatible with many different camera heads from RICHARD WOLF,KARL STORZ and PANASONIC, Stryker, Sopro-Comeg, Watec etc.9. Special treatment for the mechanical structures to bring a good handle and abrasion resistance.IPX6 waterproofModel NO.ESC-PTX-22StructureOptical glass, Aluminum and medical grade Stainless SteelFocal Length14mm 16mm 18mm 20mm 22mm 25mm 28mm 32mm 35mm are all availableMountC/CS both availableSensor Size1/2" or 1/3"DimensionΦ53.1×L43Weight103gResolution pixels1280×1024ResolutionCenrtal 150 lp/mm, Edge 100 lp/mm