The Zeiss Victory Harpia Vario eyepiece is for use with the Zeiss VICTORY Harpia 85/95 spotting scopes. Specifications of the Zeiss Victory Harpia Vario Eyepiece Magnification: 85mm: 22-65x; 95mm: 23-70x Field of View at 1,000 yds: 85mm: 189.6-63.0; 95mm: 176.4 - 58.5 Exit Pupil: 85mm: 2.50 - 1.31mm; 95mm: 2.50 - 1.34mm Focal Length: 7.48mm Zoom Factor: 3x Diameter: 2.1" Weight: 7.8 oz