In a wide range of industrial visual applications, some require very high visual requirements, requiring large aperture, large depth of field, zero distortion of the visual accessories, such as the application of dimensional measurement, which requires the use of telecentric lens, however, due to the particularity of optical design of telecentric lens, which has the characteristics of large volume, heavy weight and high cost, it is not necessary to use telecentric lens in some applications without such high requirements. Then you can choose high-definition FA lens, cost-effective relatively high. FA lens new recommended: Shiqing Technology MFA118-S series of high-definition FA lens, with high resolution, small distortion, good uniformity characteristics