Taurus Series Compact FA Lens(10MP) Model UN-TFA2528C-10MP Focal length 25mm Aperture F2.8-16 Image Format 2.3″ Mount C Field Angle D x H x V (°) 2/3″ 1/2″ 1/3" D 24.78° 18.16° 13.67° H 19.94° 14.57° 10.90° V 15.00° 11.0° 8.20° Optical Distortion -0.016% y=5.05mm -0.019% y=4.0mm -0.08% y=3.0mm M. O. D. 0.15m~∞ Dimension Φ28*28.07mm Flange BFL 17.526mm Back Focal Length 10.31mm Operation Manual Iris Manual Focus Design Wavelength 420-1000nm Filter Thread M27xP0.5