LBTEK's tube lenses are all coated with anti-reflection coatings, offering high transmittance across ultraviolet, visible, and near-infrared wavelengths. Available in two focal lengths of 200 mm or 400 mm, they are compatible with infinity-corrected objectives from major manufacturers. These lenses can be widely applied in high-resolution imaging, biomedical applications, machine vision, laser scanning, and other fields. In system applications, they can be used to: construct relay imaging with dual tube lenses, build imaging systems with various magnifications in combination with objectives, serve as replacements for existing system tube lenses, or produce high-quality images when paired with microscopes.