The Marshall V-553.9-5MP-VIS-IR M12 is a 3.9mm F2.0 1/2 Inch 5MP M12 Camera lens with a compact mechanical, smooth tactile adjustment. 3.9mm, 5.0mm, 7.6mm focal lengths Visible - IR Corrected performance and 5MP 1/2 sensor optical design.High performance 5MP image quality in visible to near zero light; broadcast, OEM, machine vision, security, med process applications. High performance Broadcast quality imaging and high performance MTF %gt; 70% at center field; > 63% at full field.