When applied to sinus endoscopy, the entrance pupil diameter is 0.2mm

2. Regarding the issue of lens fogging, when designing this product, three layers of anti fog film were coated on the protective glass to ensure the sealing of the system,

It provides a layer of protection.  

3. The endoscope meets the 4K technical indicator of 33.4 line pairs and has a high-definition endoscope system.