The KOWA TE-80XW Extreme Wide Eyepiece offers an expansive 80-degree wide-angle view that enhances your observation experience. With a fixed 40x magnification for the TSN-99 series and 35x for the TSN-88/880/770/66 series it delivers a broad field of view, 39m or 45m at 1000m distance, making it easier to locate subjects quickly. This eyepiece features advanced optical engineering, including a field flattener and XD lens, ensuring a uniformly sharp image with minimal chromatic aberration. Fully waterproof and dust-resistant with KR coating, it is compatible with Kowas SYSTEM accessories and extenders for increased magnification versatility.