https://www.asmag.com/project/resource/index.aspx?aid=16&t=secutech-made-in-taiwan-products-and-solutions
Product Info
Marshall V-4612-CS-IRC Megapixel CS-Mount Glass Lens

Marshall V-4612-CS-IRC Megapixel CS-Mount Glass Lens

Marshall Electronics
Region: United States of America
Update: 09/08/2010
Key Specifications
Features:
* 650nm IR cut filter
* Focal length: 12.0mm
* Relative aperture: 2.0
* Sensing area: 1/2" MP
* Back focal length: 10.97mm
* Angular field of view: 30.7°(H) 22.9°(V) 39.1° (D)
* Minimum object distance: 40mm
https://www.asmag.com/project/resource/index.aspx?aid=16&t=secutech-made-in-taiwan-products-and-solutions