Gemini Series SWIR Lens Model UN-GSWIR2514C Focal length 25mm Aperture F1.4 Image Format 1″ Mount C Field Angle 1″ D 61.93° H 52.21° V 40.1° Optical Distortion <-0.96% M. O. D. 0.3m Dimension Φ36.5*54.91mm Flange BFL 17.526mm Back Focal Length 11.51mm Resolution 80lp/mm Operation Manual Iris Manual Focus Design Wavelength 900-1700nm Filter Thread M34*0.5