https://www.asmag.com/project/resource/index.aspx?aid=16&t=secutech-made-in-taiwan-products-and-solutions
Product Info
FG0409G/VIR

FG0409G/VIR

HK FUGUANG INT''L INDUSTRY LIMITED
Region: China
Update: 10/23/2009
Key Specifications
Varifocal Auto/Manual Iris IR Board Lens

Model: FG0409G/VIR

Focal length: 4-9mm

Aperture: 1:1.6

Mount: M12x0.5/14mm

Format: 1/3"

Horizontal field view: 69°-30.7°

Dimension: φ28x37x38.2

Iris: Auto/manual

Back focal length: 7.03-11.3mm

Iris drive: Imported

Red(+)/green(-): Excite

White(+)/black(-): Brake

Comment: IR350-950nm

Other types: 2.8-12mm/9-22mm

https://www.asmag.com/project/resource/index.aspx?aid=16&t=secutech-made-in-taiwan-products-and-solutions