Kowa Eyepiece TE-9Z for TSN-660/660 Series Spotting Scope Field TSE-Z9B x60
Magnification: 20 to 60x zoom. Actual field of view: 1.9 to 1.0. Apparent field of view: 38° to 60. Human eye diameter: 3.3 to 1.1mm / 3.0 to 1.0mm. Eye Relief: 16.5 to 16.0mm. Field of vision at 1000m: 32.3 to 17.5m. Diameter of the iris is indicated when TSN-660/TSN-600 is attached. International Buyers - Please Note. Than you for your understanding.