Created by one of the best optical glass manufacturers in the world, the Nikon ProStaff 5 BDC Riflescope is an ideal optical experience for any discerning hunter. Nikon uses a “Glass First Principle” – choosing a specific type of glass and selection of multi-coatings for each optic they create to maximize performance and provide superior image quality. A 40mm ocular lens diameter and 2-10x magnification range makes this scope a versatile choice for mid-range shooting.