Computar - M8513 - Monofocal 2/3-inch 8.5mm f1.3 with Iris & Focus

Product Overview

The Computar M8513 is a manual iris C-mount lens designed for 2/3" format cameras. With an 8.5mm fixed focal length and bright F1.3 aperture, it provides wide-angle coverage and precise manual control for imaging and surveillance applications.

Key Configuration

2/3" format support; C-mount design; 8.5mm fixed focal length; F1.3-16C manual iris range; 1:1.3 maximum aperture ratio; 12.3mm back focal length; 0.2m to infinity focusing range; 57.4° horizontal field of view on a 2/3" camera.

Key Features

• 8.5mm fixed focal length provides consistent wide-angle framing.
• F1.3 maximum aperture supports bright imaging in lower-light scenes.
• Manual iris and focus controls allow precise adjustment during setup.
• C-mount construction supports compatibility with matching industrial and security cameras.
• Focus range from 0.2m to infinity supports both close and distant subjects.

Technical Context

When used with a 2/3" camera, the lens provides a 57.4° horizontal angle of view. Its 12.3mm back focal length and manual optical controls make it suitable for fixed-view installations where stable framing and direct adjustment are preferred.

Installation Notes

The lens is intended for C-mount cameras and should be manually focused and iris-adjusted during installation to match the scene lighting, subject distance, and required depth of field.