The surveillance camera is only a single video capture equipment, which is not unpredictable for the installation of the surveillance lens. However, during the construction process, due to various reasons, lens construction and installation errors are common, resulting in damage to the lens structure or circuit. So, what are these common questions?

1. Lens adapter ring assembly sequence error

The assembly sequence of lens adapter ring is the biggest blind spot of engineers in lens installation, and the direct consequence is lens damage. Since C and CS mating rings are often used in lens installation, many engineers often lock the mating ring and camera first, and then lock the lens into the mating ring. In design, some lenses will cooperate with the adjustment of camera backfocus or the mechanical backfocus adjustment of loose screws on the camera with a sliding structure, Under these adjustments, the lens needs to rotate on the matching ring or drive together with the matching ring to obtain the best focal clarity. However, the matching ring is locked on one side of the lens due to the wrong sequencing during assembly by engineers. In this way, in the absence of automatic back focus (ABF) function, loosening the adapter ring will not only make it impossible to reasonably adjust the back focus, but even cause the wear of lens screw teeth or the twisting of plastic screw seat on the lens due to improper force.

2. Lens assembly without gloves, resulting in coating damage

In the process of lens assembly, the most common construction failure of engineers is the coating damage caused by not wearing gloves or protection. Some engineers often find their own fingerprints or other dirt on the lens surface when the lens is assembled due to the lack of awareness of protecting the lens (installing the lens protection cover for installation) and protecting and cautious implementation of precision equipment or optical components during construction. Experienced engineers will get appropriate chlorine dioxide and wiping cloth or deer skin for wiping. However, some personnel still choose to wipe with clothes or improper paper towel for simplicity, which not only destroys the coating on the lens surface, but also hurts the "vitality" of the video picture and lens.

3. The lens is installed in the protective cover without proper window spacing

When installing the electric lens, the most easily overlooked is that the lens is installed in the protective cover without proper window spacing. When engineers adjust the depth of field or focal length after construction, they sometimes find that the image reflected by the camera or lens itself on the protective cover can be seen in the picture. At this time, even by operating the depth of field (zoom) or adjusting the focal length (focus), the picture twist cannot be changed. Inexperienced engineers will mistakenly think that the camera itself has not been adjusted well, but it is actually caused by the wrong spacing of the lens in the protective cover.

4. The lens is assembled without proper protection

In the process of lens assembly, most engineers will carefully assemble the lens. The price of the lens is very high. If you accidentally damage the lens, you can't escape the blame. However, some engineers neglect to protect the camera and lens when assembling, and even choose to carry out it in the absence of protective cushion and other preventive measures at the site, which is very easy to cause damage to the lens surface, damage to the internal aperture shutter page or wind and sand attached to the lens.

5. Lens assembly automatic aperture connection line welding error
With the efforts of lens manufacturers, most types of lenses have realized the treatment of preset lines and joints. In this way, the burning of lens servo motor caused by similar line welding errors no longer exists. However, some electric lenses have some defects in the supply or on-site protective cover, so engineers still need to understand and be proficient in these wiring and fine circuit welding techniques.