Supplying the AXIS T92E outdoor housing with an optical filter for special applications Sometimes it?s needed to use optical filters for applications to achieve better image quality. This can be license plate recognition or the use of cameras at environments with high IR radiation (bright glowing steel etc. These glass filters are available only in sizes of 50 x 50mm for an affordable price. To fit into the AXIS T92E housing tis filters needs to covered into a frame. This frame is printed by a 3D printer and encloses the filter closely to be watertight.