High Transmission Observation Head 360 Degree Rotatable. Hard Coated, Anti-Fungus Din Semi Plan Achromat Objective. Wide Field Eyepieces WF10x/18. Co-axial Focusing System with Pre-focus stopper. All moving parts supported on Ball Bearing Guides. Reverse Mounted Nosepiece Providing Additional Working Space. Built in Halogen illumination/ LED illumination.