KOWA TE-80XW Extreme wide eyepieceFind a subject quicker with a wider view of your surroundings. provides:40X fixed magnification (TSN-99 PROMINAR SERIES)35x fixed magnification (TSN-880/770 PROMINAR SERIES)This eyepiece features:A true optical innovation. Kowa engineers have developed one of the most immersive visual experiences you can expect to see in a sporting optic device.Featuring an advanced optical design, the view through Kowa TE-80XWExtreme wide angle eyepiece can only be described as breath-taking.Incorporating a field flattener and XD lens to produce a view that is completely uniform and ultra sharp across the entire image and virtually zero chromatic aberration.Compatible with Kowa TSN-99 / TSN-880 / TSN-770 series spotting scopesFully waterproof and sealed against the elements. Additional KR coating applied to the lens to actively reduce the build up of dust, dirt and other particles.Digiscoping game-changer - enjoy vignette free, ultra sharp images.100% compatible with Kowa SYSTEM accessories including the TSN-EX16 1.6x extender for magnification up to 64x when paired with TSN-99 series and 56x with TSN 880/770 series.Specs:Magnification: 40x (99 Series) 35x (880/770 Series)Field of view (degree): 80Exit Pupil Diameter: 2.5 (99/880 series) 2.2 (770 series)Relative Brightness: 6.3 (99/880 series) 4.8 (770 series)Twilight Factor: 59.3 (99 series) 55.5 (880 series) 51.9 (770 series)Eye Relief: 17.0mmField of view at 1000m: 39m (99 series) 45m (880/770 series)In the Box:- TE-80XW extreme wide eyepiece- Eyepiece carry pouch- Protection caps- Instruction manual