For high performing optics you need look no further than Sapphire ED. The award winning fully multi-coated optical system carries exceptional features like Extra-low Dispersion ED glass objective lenses and dielectric coated prisms. Elimination of chromatic aberration high light transmission and exceptional clarity are all noteworthy along with true colour reproduction of the wide view. Mechanically all operation is smooth and precise the hinge is perfectly weighted. The metal engineered focus system features a quick 1. 7 turn ratio.