Designed for Military Free Fall Instructors, this GoPro HERO4 Silver has been modified both physically and internally to support their rigorous nigh time requirements. The lens' FOV has been narrowed from 120° to 60° and has the IR cutoff filter removed. The GoPro HERO4 image encoder has been tweaked in software for highest contrast possible and will produce a gray scale image. Unlike most IR solutions, this will not create a purple image. 

An external IR LED source is suggested but have had good experiences with "Streamlight Super Tac C4 LED Flashlight w/ Infrared LED, Blister Pack 88704." 

NOTE: White LED Torches will NOT pass infrared light! Either an incandescent torch with an infrared filter must be used or a pure IR LED torch. Both 850nm and 940nm torches have been tested with great results.