The straight TSN-88S 88mm PROMINAR Pure Fluorite Spotting Scope from Kowa is a world-class spotter that redefines the standards of color brilliance, sharpness, and brightness. The TSN-88S uses an element of pure fluorite crystal (PFC) glass in its construction, which greatly minimizes chromatic aberration. This ensures maximum efficiency in its light gathering, producing a clear visual range and sharp imagery that traditional glass lenses cannot attain at their highest magnifications and with the strongest of subject/background contrast changes. The housing is made of a magnesium alloy that defines maximum durability and lightweight construction, resulting is a compact, ergonomic, and functional design for extreme nature and outdoor enthusiasts. An eyepiece is not included and sold separately.