Computar - T4Z2813CS-IR - F1.3 with Iris & Manual Iris CS Mount, Day/Night IR, 2.8-12mm Lens

Product Overview

The Computar T4Z2813CS-IR is a manual iris varifocal lens designed for true day/night cameras with infrared illumination. Its 2.8-12mm focal length range provides flexible scene coverage, while IR-corrected optics help maintain image sharpness when switching between visible and infrared light.

Key Configuration

Lens type: IR varifocal lens; format: 1/3"; mount type: CS mount; focal length: 2.8-12mm; iris range: F1.3; maximum aperture ratio: 1:1.3; maximum image format: 4.8 x 3.6mm.

Key Features

• 2.8-12mm varifocal range supports both wide-area viewing and tighter scene framing.
• IR-compatible design is suited for true day/night cameras using infrared illumination.
• Manual iris and focus controls allow precise optical adjustment during setup.
• CS-mount design supports compatible 1/3" camera systems.
• All-glass optics and metal construction provide stable imaging performance.

Technical Context

The lens provides a horizontal angle of view from 102.2° to 23.7°, a vertical angle of view from 74.2° to 17.8°, and a down angle view from 133.0° to 29.7°. These ranges make it suitable for applications requiring adjustable coverage from broad monitoring to narrower target views.

Installation Notes

Use with compatible CS-mount 1/3" format cameras. This manual iris lens is best suited for indoor installations or stable lighting environments where iris, zoom, and focus can be set during installation.