Exceptional Design: This spotting scope system combines exceptionally flexible modularity with optical perfection. The objective lens can be changed to suit any viewing situation SWAROVISION Technology: Extreme detail recognition is offered at crucial moments thanks to SWAROVISION technology. This technology redefined the concept of optical quality Fluoride-Containing HD Lenses: Field Flattener lenses provide unprecedented peripheral definition, fluoride-containing HD lenses minimize color fringing, while optimized coatings ensure maximum color fidelity 115mm Objective Module: The 115mm objective module raises the bar with the largest lenses on the market. This gives you a crucial benefit, particularly at dawn and dusk Field Flattener: The SWAROVSKI OPTIK 115mm Objective Module uses Field Flattener lenses that provide unprecedented peripheral definition