Not for Wide

Many image sensors are sensitive not only to visible light but also infrared. As it usually goes in the photograph to the visible part of the light and most lenses are calculated only for visible light, the camera manufacturers to build an infrared cut filter. Whether your camera still has a remaining sensitive to infrared light, which can be determined by light with the infrared diode of a remote control in the camera and take a picture or watching the live view. In the same way I've convinced myself that this filter blocks the infrared portion.

The filter has a very slight green cast. Normally, does not stand out, but with extreme wide-angle lenses (10mm on crop sensor) I have noticed a green screen. Probably comes from the fact that that the light rays fall diagonally through the filter and therefore travel a longer path through the glass.

In theory may lead sensitivity to color casts or blur the IR, in practical situations, but me no difference between recordings with or without IR filters are still noticed.

For telephoto lenses as a UV / IR filter is certainly a good alternative to pure UV filter. For wide-angle I stay at the UV filter.