The es 80 ga ed45 advances the tradition of quality and value with a new multi coating system integrated into an all new magnesium polycarbonate and aluminium body now 100 nitrogen waterproof the fully rubber armoured body houses a high grade ed extra low dispersion glass element within the objective lens system that virtually eliminates the distorting effects of chromatic aberration at magnifications over 35x as a result images are vibrant and true to life and whats more reproduce