This is 1MP high-definition OV9734 CMOS sensor industrial endoscope camera module with 3.9mm diameter steel shell. Through the precise combination of 720P high-definition resolution (1280x720) and a 3.9mm diameter steel shell, it achieves a perfect balance of small size and high image quality. The steel sleeve not only protects the 1/9-inch photosensitive element and 1.4μm pixel structure of the OV9734 sensor but also ensures the stable operation of the lens in narrow spaces, preventing image distortion caused by mechanical compression. The design of a 1.08mm focal length and F4.0 aperture further optimizes light capture efficiency, while manual focusing (10~100mm) and a distortion rate of less than -10% enhance the ability to restore details. Its 83° horizontal field of view and 43.5° vertical field of view are suitable for scenarios requiring precise positioning, such as industrial pipeline inspection or precision instrument maintenance.