Description BARSKA 15-40×50 Colorado Detection Scope Details The 15-40×50 Colorado Spotting Scope is a lightweight zoom spotting scope useful for bird watching and spotting at the target range. Multicoated glass and a BK-7 Porro prism transmit bright contrast-rich images throughout the entire zoom range. An included mini tripod is foldable and convenient for terrain navigation and Nature observation on-the-go. Fully coated optics with a joint prism system Large 50mm lens lens Armor rubber shock absorption Come with a tabletop tripod and soft carrying case The highest clarity range is at 150 yards. beyond 150 yards, naturally, the image will start to blur.