The Tangent Theta 56mm Stackable Sunshade is a custom-designed, high-end optical accessory built specifically to match the diameter and threading of Tangent Theta's 5-25x56mm and 7-35x56mm riflescopes. Measuring 4.6 inches in length, this sunshade features a profiled interior that effectively dampens and blocks direct sunlight to prevent harsh lens flare and image degradation. By extending past the objective lens, it actively shields the glass from environmental elements like rain and dust while heavily reducing the "mirage effect" caused by rising heat from a hot barrel or the ground. True to its name, its threaded ends are stackable, allowing shooters to chain multiple units together to achieve custom lengths for maximum glare protection in extreme lighting environments. Tangent Theta 56mm 4.6" Length Stackable Sunshade for Tangent Theta Scopes 800291 in Matte Black, 56mm diameter