Selecting an integrated camera pays attention to two issues

When purchasing an integrated camera, it's important to keep two key points in mind. Firstly, fixed-focus lenses come with only one focus adjustment ring that can be manually adjusted. Turning this ring either way sharpens the image on the CCD target surface. Since these lenses lack an aperture adjustment ring, the amount of light entering the lens remains constant and can only be altered by changing the brightness of the scene being captured. This simplicity in design results in lower costs. On the other hand, automatic aperture power zoom lenses have an additional two micro-motors compared to standard auto-iris fixed-focus lenses. One motor controls the zoom function, adjusting the focal length when rotated, while the other focuses the lens when controlled to turn. However, due to the inclusion of these extra motors and a more complex lens assembly, the overall size of the lens increases. Additionally, six electric three-variable lenses differ slightly from regular auto-iris motorized zoom lenses as their aperture adjustment motor is manually controlled via a controller rather than automatically. The focal length of a manual iris fixed-focus lens is adjustable within a certain range using a focal length adjustment ring. Typically, the variable ratio ranges between 2 to 3 times, with focal lengths usually spanning from 3.6mm to 8mm. In practical applications, selecting different viewing angles is straightforward by manually adjusting the zoom ring of the lens. However, once the installation position of the integrated camera is set, frequent manual adjustments become cumbersome. Thus, after completing a project, the focal length of manual zoom lenses is rarely readjusted, functioning primarily as a prime lens. Secondly, since long focal-length lenses tend to be heavier, telescopic lens designs often incorporate a negative lens behind the main lens, shifting its principal plane forward. This design allows for a shorter lens body while achieving a longer focal length effect. Reflective telescope lenses utilize mirrors to form images, but due to their design, they cannot accommodate apertures and can only adjust exposure through the shutter mechanism. Similar to traditional telescopic lenses, reflective telescopes are less commonly found in consumer-grade products. In conclusion, when choosing an integrated camera, understanding both the functional aspects of different lens types and the practical limitations they impose is crucial. These considerations ensure that you select a camera system best suited to your specific needs and environment.