Kowa's HC-V series is made for use in high-vibration and high-shock environments. With a design based on Kowa's standard 1-inch HC lenses, this ruggedized megapixel lens series is ideal for applications that require increased durability and high optical performance. All internal glass elements of this series are glued. A two-way reversible nut is utilized to tightly lock the focus adjustment ring. Interchangeable iris plates, which can be glued, are used to select the F-stop.