Compact, lightweight & redesigned body. Aspherical lenses minimize distortion and provide sharp images up to the periphery. Multi-layer coated lenses for bright images. Special rubber armour for shock-resistance and firm, comfortable grip. Carbon fiber in the body material improves durability. Click-type dioptre adjustment ring prevents unintentional rotation. Larger focusing knob for smooth operation. Eco-glass optics are free of lead and arsenic.