Exceptional Performance: The SWAROVSKI OPTIK NL Pure 10x52 Binoculars has exceptional twilight performance thanks to a 52 mm objective lens diameter. Ideal Fit: The NL Pure 10x52 binoculars are ideal for surveying open spaces, for observations at dawn and dusk. They are an ideal mix of good detail recognition and large field of view. Ergonomic: The characteristic NL Pure wasp waist ensures the NL Pure 10 x 52 binoculars sit ergonomically in your hand. High Performance: The pioneering SWAROVISION technology with field flattener lenses offsets the curvature of the field of view to provide exceptional edge sharpness. Color Fidelity: The special coating on the lenses in combination with the inert gas filling ensures color fidelity