SMX-M8xx Series USB2.0 Camera User Guide
Chart of the IR-cut filter transmission characteristics
When to Use the C-mount Adapter with IR-cut Filter
C-mount adapter with IR-cut filter use with the color cameras. Since the SMX-M8xx color cameras are sensitive to IR-light, use the C-mount adapter with IR-cut filter for the color camera models to make colors of the image more realistic.
Many light sources, including the sun, emit infrared light, so the color camera in daylight will see a significant amount of infrared light without the IR-cut filter. As a result, strange and non-realistic colors appear.
Another reason for using the IR-cut filter is the limited color correction for many lenses. A lot of lenses have different depth of focus for the visible and infrared spectrum. The IR-cut filter cuts away a significant amount of the overall collected light and thereby affects the sensitivity in a negative way. In general, color cameras are one factor less sensitive compared to monochrome (depending on the sensor). This is primarily due to the IR-cut filter.
Basic Guidelines on Using the SMX-M8xx Series USB2.0 Cameras
