Selecting an integrated camera pays attention to two issues

When buying an integrated camera, you need to pay attention to two issues.

1. The fixed-focus fixed-focus lens has only one focus adjustment ring that can be manually adjusted. Rotating the ring left or right makes the image on the CCD target surface appear sharpest. Without the aperture adjustment ring, the aperture cannot be adjusted, and the light flux entering the lens cannot be changed by changing the lens factor, and can only be adjusted by changing the illuminance of the field of view. The structure is simple and the price is cheap.

The automatic aperture power zoom lens has two micro motors compared to the auto iris fixed focus lens. One of the motors is zoomed in and out of the lens to control the focal length of the lens when it is rotated; the other motor is fused with the focus of the lens. The lens can be focused when it is controlled to rotate. However, due to the addition of two motors and an increase in the number of lens groups, the volume of the lens increases accordingly. 6 Electric three-variable lens Compared with the automatic iris motorized zoom lens, the control of the aperture adjustment motor is changed from automatic control to manual control by the controller.

The focal length of the manual iris fixed focus lens is variable. There is a focal length adjustment ring that can adjust the focal length of the lens within a certain range. The variable ratio is generally 2 to 3 times and the focal length is generally 3.6~8mm. In practical applications, the market's market angle can be easily selected by manually adjusting the zoom ring of the lens. However, it is inconvenient to frequently adjust the zoom manually after the mounting position of the integrated camera is fixed. Therefore, after the completion of the project, the focal length of the manual zoom lens is generally seldom adjusted. Only play the role of prime lens.

2, because the long focal length of the lens is too heavy, so there is a telephoto lens head design, that is, plus a negative lens behind the lens, the main plane of the lens forward, can be used to obtain a shorter lens body to obtain a long focal length effect.

Reflective telescope heads use mirrors to form images, but because of the design relationship, they cannot be equipped with apertures. They can only be adjusted with the shutter. As with telephoto lenses, they are rarely seen in civilian areas.