Fujinon Lenses 
Fujinon YV5X2.7R4B-SA2L 2.7-13.5mm Auto Iris Vari-Focal Length Lens (DC Type) YV5X27R4BSA2L

YV5X27R4BSA2L :

2.7-13.5mm Auto Iris Vari-Focal Length Lens (DC Type) F1.3 CS-Mount (Day/Night)

Designed for day and night operation, the YV5x2.7R4B is the widest-angle (2.7-13.5mm) vari-focal length lens available for this application. Specialized optics provide crisp color images in daylight and black and white images in darkness - without the need to refocus. The YV5x2.7R4B has a focal length range of 2.7 to 13.5mm, an aperture range of F1.3 to T360, and a 100 degree angle of view at 2.7mm.