From Fujinon and designed for day and night operation, the YV5x2.7R4B is a wide-angle (2.7-13.5mm) vari-focal length lens. 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.