Computar - CMP-H3Z4512CS-IR - 1/2-inch 4.5-12.5mm F1.2 with Iris & Focus, Day/Night IR

Product Overview

The Computar H3Z4512CS-IR is a 1/2" CS-mount varifocal lens designed for CCTV and factory automation applications. With a 4.5-12.5mm focal length range, F1.2-16C manual iris, and IR-corrected optics, it supports flexible imaging with reduced focus shift when used on day/night cameras.

Key Configuration

Model: Computar H3Z4512CS-IR; lens format: 1/2"; focal length: 4.5-12.5mm; iris range: F1.2-16C; max aperture ratio: 1:1.2; iris type: manual iris; mount: CS-mount; max image format: 6.4mm x 4.8mm.

Key Features

• 4.5-12.5mm varifocal range supports flexible wide-to-narrow scene coverage.
• F1.2 aperture helps deliver strong low-light performance.
• IR-corrected optics help eliminate focus shift on day/night cameras.
• Manual iris and focus controls provide precise setup for stable lighting conditions.
• All-glass optics, locking set screws, and metal construction support durable installation.

Technical Context

On a 1/2" camera, the lens provides a horizontal angle of view from 81.6° to 30.0°, a vertical angle of view from 60.4° to 22.6°, and a diagonal angle of view from 103.0° to 37.4°. This range makes it useful for installations requiring adjustable coverage from broader views to tighter monitoring.

Installation Notes

Use with compatible 1/2" or smaller CS-mount cameras. Manual iris lenses are best suited for indoor environments with stable or moderately variable lighting; after installation, set the iris and focus, then secure the locking screws.