Computar - CMP-T4Z2813CS-IR - 1/3" F1.3 with Iris & Manual Iris CS Mount, Day/Night IR, 2.8-12mm Lens

Product Overview

The Computar T4Z2813CS-IR is a 1/3" CS-mount varifocal lens designed for true day/night cameras with IR illumination. With a 2.8-12mm focal length range, F1.3 aperture, manual iris control, and IR-corrected optical design, it supports flexible surveillance framing and clear imaging in stable lighting environments.

Key Configuration

Model: Computar T4Z2813CS-IR; lens format: 1/3"; focal length: 2.8-12mm; aperture: F1.3; max aperture ratio: 1:1.3; iris type: manual iris; mount: CS-mount; max image format: 4.8mm x 3.6mm; application: true day/night IR cameras.

Key Features

• 2.8-12mm varifocal range supports wide-area coverage and tighter scene framing.
• F1.3 aperture helps improve image brightness in low-light conditions.
• Manual iris control allows precise exposure adjustment in stable lighting environments.
• IR-corrected design helps reduce focus shift with infrared illumination.
• All-glass optics and metal construction support reliable surveillance performance.

Technical Context

The lens provides a diagonal angle of view from 133.0° to 29.7°, a horizontal angle of view from 102.2° to 23.7°, and a vertical angle of view from 74.2° to 17.8°. This makes it suitable for applications that need broad coverage with the option to narrow the view during setup.

Installation Notes

Use with compatible 1/3" CS-mount day/night cameras. After mounting, adjust focal length, iris, and focus for the required field of view, then verify image sharpness under both visible light and IR-assisted night conditions.