This is a new infinity-corrected objective lens designed for metallurgical microscopes, offering an extended working distance. The lens is in new condition and ships with free shipping. It is intended for professionals in material science, metallography, or quality control who need to examine prepared samples with ample clearance for tools or heating stages. The long working distance is practical for inspecting larger or uneven specimens. This objective is a direct replacement or upgrade for compatible microscope models. Please check the listing for full specifications, including magnification and numerical aperture, to ensure it meets your system's requirements. New Infinity Long Working Distance Objective Lens for Metallurgical Microscope. Condition: New, Made in China. Listed at 58.99 USD. Object field of view(on object, mm): 9, 4.5, 2.2, 1.1, 0.45, 0.22. Working Distance(mm): 11.2, 23.6, 17.7, 10.4, 7, 3.2. Focal Length(mm): 72, 36, 18, 9, 3.6, 1.8.