Designed to seamlessly integrate with their TSN-99, TSN-880, and TSN-770 Prominar spotting scopes, the Kowa TE-80XW 40x Extreme Wide-Angle Eyepiece delivers crisp and clear views with an exceptional 80° field of view that makes viewing and digiscoping through it a unique and immersive experience. Exceptional 80° apparent angle of view presents an expansive visual experience to take in the entire landscape without having to pan the scope The wide field of view is ideal for digiscoping because you will not experience vignetting when using a smartphone or camera Fixed 40x power when used in the TSN-99, 35x with the TSN-880 & TSN-770 Extremely low-dispersion glass virtually eliminates chromatic aberration across the entire field of view for improved resolution, clarity, and color rendition Integrated field-flattener lens eliminates lens curvature to give you clear views from edge-to-edge without distortion Proprietary KR coating on the exterior of the lens actively repels dirt, moisture, and dust from collecting on its surface to ensure clear views 117.5-foot field of view at 1000 yards with the TSN-99, 135.5 feet with TSN-880 & TSN-770