https://www.asmag.com/project/resource/index.aspx?aid=16&t=secutech-made-in-taiwan-products-and-solutions
Product Info
ZS5100A  Vari-focal Auto Iris DC Control

ZS5100A Vari-focal Auto Iris DC Control

Fuzhou Zhengsheng Photoelectric Instrument Co.,Ltd.
Region: China
Update: 04/07/2006
Key Specifications
Specification : Auto 5-100

Focal length : 5-100mm

Relative aperture : 1.8

Angular field of view : 54-27

Back focal length : 12.526mm

Iris system : Auto Iris

Mount type : CS-Mount

Weight : 215g

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