Sumix SMX-160x - Manual (Page 53)

How to Use
53 SMX-160 Series USB2.0 Camera User Guide
Another reason for using the IR-cut filter is the limited color correction for some 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.
Note: When the camera is used with an IR-cut filter, the focus distance is increased to 0.66 mm. To restore the focus dis-
tance to the original value (when the camera is used without IR-cut filter ring and a ring-adapter) we suggest
using a ring-adapter:
How to Use
Usually the camera is supplied with the IR-cut filter screwed in. The procedure of
screwing the IR-cut filter in and using the ring-adapter is described below.
Screw the IR-cut filter in as follows:
1 Remove the cover from the camera.
2 Put the IR-cut filter to the camera so that the two holes on the filter are faced up - see
the picture below.