High-resolution, high-contrast imaging; accurate magnification with 6 and 9 magnification settings (customizable). Suitable for uneven tested products, this lens can perform built-in focusing. The magnification is accurate, with 6 and 9 magnification settings (customizable). The built-in fine adjustment can reach up to 10mm, and the length can be customized. The repeat positioning accuracy is high, with repeatability up to 1um. The zoom process is smooth and stable, with minimal center shift for comfortable use. Made of high-hardness and wear-resistant materials, it has a long service life. It features a universal ring light interface, allowing for flexible configuration of bottom or ring lighting sources as needed.