The LA TM 308IR is designed to have the same focal point in the IR light range as in the visible light range. Since there is no focus shift in any light condition, the lens is ideal for use with Day/Night cameras. However, as the depth of field in the IR range is very narrow, focus adjustment should be done very carefully. So, when you install the lens with IR illumination, please check your focus setting in both visible light and IR light.
