10.5X microscope auxiliary objective lens can double the total magnification of the microscope and reduce the focaling length. 2It can effectively expand the observation field and facilitate the observation of the internal structure of small objects. 3Perfect microscope accessories, exquisite workman, can be widely used in single barrel electron microscope. 4Using high-quality metal and optical glass, with good durability and stability. 5Using 42mm installation interface, working distance is 140mm, can be directly installed.Condition: 100% Brand New Item Type: Microscope Objective Lens Material: Metal, Optical Glass Weight: Approx. 76g / 2.7oz Microscope Auxiliary Objective: 0.5X Working Distance: Approx. 140 mm / 5.5 in Installation Size: Approx. 42 mm / 1.7 in Application: Monocular Electron Microscope1 x 0.5X Microscope Objective Lens1.Please allow 0-1 inch error due to manual measurement. Thanks for your understanding.2.Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.