Lution), also known as resolution, discrimination, discriminating power, analytical power, resolution and resolution, refers to the ability of a photographic lens to clearly reproduce the subtle details of a scene. The higher the resolution of the lens, the sharper and more detailed the image is. Its unit is "pair/mm". Acutance, also known as sharpness and sharpness, is the ability of a photographic lens to vividly reproduce intermediate levels of the subject, sharp edges, low-contrast detail, weak brightness contrast, and subtle color changes. The lens with high sharpness has a sharp outline, sharp edges, normal contrast, rich layers, fine texture, clear tone, strong texture, soft color, and true and natural color reproduction. The combined performance of resolution and sharpness is called Clarity. Resolution and sharpness are two important factors in evaluating the quality of a photographic lens. Second, distortion also has an important impact on the quality of the image. It is a kind of aberration. The concrete manifestation is that the straight line on the object becomes curved after being imaged by the lens. When shooting a square object, the phenomenon of curling or bulging around is caused by distortion. A good camera lens distortion rate is controlled within 5% of the human eye is not easy to detect. The lens distortion rate for measurement or platemaking applications must be below 0.1%. A universal lens, such as a TV monitor lens used in security, requires low cost in design and is advantageous for mass production, so it uses a simple optical structure and manufacturing process and assembly process to achieve low resolution and sharpness. The indicators can be said to be very poor, and the image is distorted. For example, the monitoring image is a little blurry and the edge image is distorted. In fact, from the optical point of view, the residual aberration is too large. However, the security field requires that you can see people clearly. This kind of lens is really a good choice for cheap systems. Professional lenses are often used in situations where high image quality is required. Not only do you need to distinguish the target, but you also need to distinguish the target details. In some cases, the target is not distorted for observation and measurement. In order to achieve such high-quality imaging, the general-purpose lens of the market cannot meet these specific requirements, and a professional lens must be used in order to fully utilize the performance of the camera and obtain a satisfactory image. Fixed Single Desk And Chair,School Table Desk,Study Chair Set,Classroom Desk And Chair AU-PINY FURNITURE CO., LTD , https://www.aupinyjm.com