C-Mount Lenses for Machine Vision, FA and Industrial Imaging
C-Mount Lens Product Database
Explore TOWIN C-Mount lenses by sensor size, focal length, resolution, field of view, distortion, aperture and other specifications. Use the filters below to find the right lens for your camera and application.
Lens P/N | E.F.L. | Sensor | H. F.O.V. | MP | Max Dist. | FNo. | Iris | T.T.L. |
|---|---|---|---|---|---|---|---|---|
25mm | 2/3" | 18° | 8MP | 1.5% | 1.6 | Manual | 58.9 | |
4.0mm | 1/1.8" | 83° | 5MP | 0.5% | 2.0 | Manual | 35.14 | |
8mm | 1.1" | 85° | 20MP | 5.4% | F1.4~16 | Manual | 81 | |
5mm | 2/3" | 82° | 5MP | 2.8% | 1.6 | Manual | 50.59 | |
8-40mm | 1/1.8" | 47°~11° | 5MP | 6.1% | 1.4 | DC Auto | 111.4 | |
15-30mm | 2/3" | 33°~8° | 5MP | 0.9% | 1.4 | DC Auto |
C-Mount Lens Types
Machine Vision Lenses
Designed for high-precision industrial inspection and measurement, our machine vision C-Mount lenses deliver excellent resolution and low distortion.
FA Lenses
Optimized for factory automation and industrial applications, our FA lenses ensure stable imaging, accurate measurement and reliable performance.
Industrial C-Mount Lenses
Built for demanding industrial environments, our C-Mount industrial lenses offer robust performance, high optical quality and long-term reliability.
ITS & Traffic Lenses
Our ITS and traffic lenses are optimized for intelligent transportation systems, providing clear and stable imaging in various road and weather conditions.
High-Res C-Mount Lenses
Support 10MP, 20MP, 45MP and higher resolution sensors, our high-resolution C-Mount lenses deliver exceptional clarity and detail for advanced vision systems.
Varifocal C-Mount Lenses
Featuring adjustable focal length and variable field of view, our varifocal C-Mount lenses are ideal for surveillance, industrial observation and flexible imaging.
C-Mount Lens Selection Guide
Choosing the right C-Mount lens requires a systematic evaluation of multiple factors, including sensor size, focal length, resolution, image circle, working distance, distortion and aperture. This guide provides a step-by-step framework to help you quickly select the optimal C-Mount lens for your application.
1Sensor Size
Ensure the lens image circle covers the entire camera sensor without vignetting. Different sensors (1/3", 1/2.8", 2/3", 1", 1.1", 4/3", etc.) require different image circle sizes.
2Focal Length
Shorter focal lengths provide a wider field of view (FOV), while longer focal lengths narrow the view and offer higher magnification. Consider the relationship between focal length, FOV, and working distance.
Try the FoV Calculator →3Resolution
Match the lens resolution to your camera sensor to avoid limiting system performance. Common options include VGA, 2MP, 5MP, 8MP, 10MP, 12MP, 20MP and 45MP.
4Image Circle
The image circle must be larger than the sensor diagonal to avoid vignetting. Larger sensors (1", 1.1", 4/3") require lenses with bigger image circles.
5Working Distance
Working distance (WD) affects the field of view and image sharpness. It should be considered together with focal length and sensor size to achieve the best imaging results for your application.
6Distortion & Aperture
Control distortion for accurate measurement and inspection applications. The aperture (F-number) affects light intake, image brightness and depth of field.
Check Distortion Guide →C-Mount Lens Specifications
| Parameter | Description | Typical Values / Options | Why It Matters |
|---|---|---|---|
| Mount | C-Mount (17.526 mm flange distance) | C-Mount | Ensures compatibility with industrial cameras |
| Flange Distance | Distance from mount to image plane | 17.526 mm | Affects back focus and mechanical compatibility |
| Sensor Size | Compatible camera sensor formats | 1/3" - 4/3"+ | Determines the required image circle |
| Focal Length | Optical focal length of the lens | e.g. 4mm, 8mm, 12mm, 25mm | Controls the field of view (FOV) |
| Resolution | Maximum resolving power | MP (e.g. 2MP, 5MP, 10MP, 20MP, 45MP) | Matches camera sensor resolution |
| Image Circle | Diameter of the image circle | e.g. 8mm, 11mm, 16mm | Prevents vignetting and ensures full coverage |
| Working Distance | Distance from lens to target object | e.g. 100mm, 300mm, 1m+ | Affects focus, FOV and system design |
| Distortion | Optical distortion level | < 1%, < 0.5% (low distortion) | Important for measurement and inspection |
| Aperture (F-number) | Lens opening size | F1.2, F1.4, F1.8, F2.0, F2.8 | Controls light intake and depth of field |
| Iris Type | Aperture control method | Fixed / Manual / Auto iris | Adjusts exposure and image brightness |
| Focus | Focusing mechanism | Fixed / Manual | Affects installation and image sharpness |
| IR Correction | Infrared light compensation | Optional | Suitable for day/night or NIR applications |
C-Mount Lens Applications
C-Mount lenses are widely used in various industrial and intelligent imaging scenarios. Different applications require different optical characteristics. Here are the most common use cases and recommended features.
Why Choose TOWIN C-Mount Lenses
TOWIN delivers high-performance C-Mount lenses designed for machine vision, FA and industrial imaging. With advanced optical design and strict quality control, we ensure excellent image quality, low distortion and reliable performance.
Optical Design
Optimized for various sensors and applications.
High Resolution
Supports high-resolution cameras (2MP–45MP).
Distortion Control
Low distortion for accurate imaging and measurement.
Large Sensor
Compatible with 1/3"–4/3"+ sensors.
Custom Focal
Flexible design for specific needs.
Mechanical Design
Robust and compact structure for easy integration.
Prototype
Fast prototype and sample support.
OEM/ODM
Custom solutions for global clients.
MTF Testing
Ensures consistent optical performance.
Mass Production
Stable supply and reliable quality control.
C-Mount Lens Selection Resources
Access our professional guides and tools to help you quickly select the right C-Mount lens for your application. From basic knowledge to practical calculation, we provide comprehensive support.
Lens Selection Guide
Learn how to choose the right industrial lens based on sensor size, focal length, FOV and application requirements.
View Guide →
Sensor Guide
Understand camera sensor sizes, image circles and compatibility with C-Mount lenses.
View Guide →
FOV Calculator
Calculate the horizontal, vertical and diagonal field of view based on sensor size, focal length and working distance.
Use Calculator →
Distortion Guide
Learn about barrel, pincushion and TV distortion, and how to choose low-distortion lenses for precise imaging.
View Guide →Learn More from Our Blog
Frequently Asked Questions
Need Help Choosing a C-Mount Lens?
Need help selecting a C-Mount lens for your camera, sensor, field of view or working distance? TOWIN can recommend suitable optical configurations and develop customized C-Mount lenses for machine vision, FA, industrial inspection and ITS applications.