20x to 60x Magnification range Advanced Apochromat Optical System with ED (Extra-low Dispersion) Glass Minimizes Color Fringing to the Furthest Limit of the Visible Light Range Field Flattener Lens System Delivers Sharp Images all the Way to the Periphery Multilayer Coating for Natural Color Fidelity Optimized Focusing System for Fast Focusing; Angled Body design for comfortable observation