1/3″ 2.8-12mm F1.3 Varifocal, DC Auto Iris (CS Mount) Day/Night IR
By: Computar
Lens Optics for over 40 Years

Computar : TG4Z2813FCS-IR
Description
The Computar TG4Z2813FCSIR DC Auto Iris lens has a 2.8-12mm Focal Length and an Iris range of F1.3. The TG4Z2813FCS IR has a 1/3″ Format with a Metal barrel and CS Mount and is IR Corrected for True Day/Night operation. Locking set screws on zoom, focus, and iris rings as well as precision all glass optics ensure minimal distortion for this varifocal lens.
Specifications
Focal Length | 2.8mm - 12mm |
Max. Aperture Ratio | 1:1.3 |
Max. Image Format | 4.8mm x 3.6mm |
Operation Range | Iris = F1.3 - F360C; Focus = 0.3m-Inf.; Zoom = 2.8mm - 12mm |
Control | Iris = DC Auto Iris; Focus = Manual; Zoom = Manual |
Angle of View | D = 133 - 29.7; H = 102.2 - 23.8; V = 74.2 - 17.8 |
Coil | Drive = 190 Ohms; Control = 855 Ohms |
Operating Temperature | -10C - 50C |
Effective Lens Aperture | Front = 23.0mm; Rear = 7.2mm |
Back Focal Length | Tele = 20.2mm; Wide = 8.1mm |
Flange Back Length | 12.5mm |
Mount | CS-Mount |
Dimensions | 37.5mm x 48mm x 56mm |
Weight | 71g |
Resources & Documents
tg4z2816fcs-mpir_02-12.pdf | Data Sheet |