Sumix SMX-12A2x - Manual (Page 59)

Use of Accessories
59
Chapter 8
U
SE OF
A
CCESSORIES
SMX-12A2x Series cameras can be supplied with the following accessories:
1. C-mount adapter
2. C-mount adapter with IR-cut filter
3. Tripod adapter
This chapter will show you how to use the cameras with adapters.
Using C-mount Adapter with IR-cut Filter
The SMX-12A2Cx Series cameras can be a C-mount (with the adapter/adapter with filter)
or a CS-mount (without the adapter/adapter with filter).
IR-cut Filter Characteristics
The IR-cut filter provided with the camera has the following characteristics:
● Diameter = 20mm
● Thickness = 2 mm
C-mount
In this case, the camera is used with the C-mount adapter or with the C-mount adapter
with IR-cut filter:
-
Using Adapter with Color Cameras. Since the SMX-12A2C 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, non-realistic colors appear.
Another reason for using the IR-cut filter is the limited color correction for many lenses.
that 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.
Using Adapter with Monochrome Cameras. SMX-12A2M monochrome cameras are
more sensitive to infrared light than color models. Using the cameras in the
environment rich for infrared light may result in highlighted images. To avoid this effect,
use the C-mount adapter with IR-cut filter for monochrome cameras.