https://www.asmag.com/project/hikvision_large-scale_ai_survey/
Product Info
Seiko Star TLV4512MF16IRMP Surveillance Lens

Seiko Star TLV4512MF16IRMP Surveillance Lens

Seiko Star/
Region: China
Update: 05/04/2011
Key Specifications
Features: 
● Image format cover: 12" 
● Focal length: 4.5 to 12mm 
● Back focal length: 12.86 to 21.19mm 
● Iris range: F1.6-C 
● Minimum object distance: 0.3m
https://www.asmag.com/project/dahua_xinghan_large-scale_ai_models/