C-Mount Lenses for Machine Vision | 1/4" to 1.2" Sensors | 4-75mm | Same-Day US Shipping

C-Mount Lenses for Machine Vision Systems

Industrial optics for cameras with sensors from 1/4" to 1.2" format (4.5mm to 17.6mm diagonal). All lenses in stock at our US warehouse with same-day shipping.

Whether you're designing quality inspection systems, ITS traffic monitoring, robotics applications, or automation solutions, C-mount lenses deliver the optical performance your machine vision system demands.

Focal Range 4-75mm
Sensor Coverage 1/4" to 1.2"
Resolution 5-25MP
C-Mount Lenses for Machine Vision Systems

Why C-Mount Lenses Excel for Machine Vision

Machine vision systems operate at specific working distances—inspecting parts on conveyors at 500mm, scanning barcodes at 300mm, or monitoring traffic at 10-20 meters. C-mount lenses are engineered specifically for these "finite conjugate" distances, delivering peak optical performance exactly where industrial cameras work. This optimization means sharper images, more accurate measurements, and better defect detection compared to consumer lenses designed for photographing distant objects.

The key advantage of C-mount lenses for machine vision lies in their fast apertures (F/1.4-F/2.0) which maximize light throughput for shorter exposure times and better signal-to-noise ratio in challenging lighting conditions. Combined with support for sensors from 1/4" to 1.2" (4.5mm to 17.6mm diagonal) that enable global shutters for distortion-free capture of moving objects, C-mount lenses provide the optical foundation for reliable industrial vision systems. Lenses designed for larger formats will work with smaller sensors, providing a narrower field of view.

C-Mount Lenses by Sensor Format - In Stock

Imaging optics for sensors from 1/4" to 1.2" format - Samples ship same-day from California

Ruggedized C-Mount Lenses - US Stock

Enhanced mechanical construction for harsh environments with superior shock and vibration resistance - Ships within 24 hours

C-Mount Lenses for Industrial Machine Vision

C-mount lenses are the industry standard for machine vision systems, quality control applications, and industrial automation. With our complete inventory stocked in California, we ship same-day throughout the United States for orders placed before 3PM PST. This means you get the lenses you need tomorrow, not next week—critical when production lines are waiting.

The C-mount standard (1"-32 thread, 17.526mm flange distance) ensures compatibility across all major camera manufacturers including Basler, FLIR, Allied Vision, and IDS. Supporting sensors from 1/4" to 1.2" format (4.5mm to 17.6mm diagonal), C-mount lenses provide the flexibility to choose the right sensor for your application—from cost-effective 5MP sensors for basic inspection to high-resolution 25MP sensors for detailed measurement tasks. Lenses designed for larger formats will work with smaller sensors, providing a cropped field of view.

What sets C-mount lenses apart for machine vision is their optimization for finite working distances. When your camera needs to inspect parts at 500mm or read barcodes at 300mm, these lenses deliver peak optical performance exactly at those distances. Fast apertures from F/1.4 to F/2.0 maximize light throughput, enabling shorter exposure times to freeze motion and reduce blur in high-speed applications. This superior light-gathering ability is critical for maintaining image quality in challenging industrial lighting conditions.

Every C-mount lens includes lockable focus and iris rings—essential features when cameras are mounted on vibrating equipment or moving robots. The all-metal construction maintains precise optical alignment across temperature ranges from -20°C to +60°C, ensuring consistent performance in both climate-controlled cleanrooms and harsh factory environments. With resolutions supporting pixel sizes down to 2.2μm and multi-layer coatings for both visible and NIR wavelengths, these lenses meet the demands of today's advanced machine vision algorithms.

C-Mount Technical FAQ

Common questions from machine vision engineers

Why choose C-mount lenses over M12 lenses for machine vision?
C-mount lenses are optimized for the finite working distances (200mm-2000mm) used in machine vision applications, providing sharper images and more accurate measurements at these distances. The key advantage is their fast apertures (F/1.4-F/2.0) which provide superior low-light performance through increased light throughput, enabling shorter exposure times and better signal-to-noise ratios. Additionally, C-mount supports larger sensors up to 1.2" (17.6mm diagonal) which enables global shutters for capturing moving objects without distortion—critical for conveyor inspection and high-speed applications.
What sensor formats do C-mount lenses support?
C-mount lenses support sensors from 1/4" (4.5mm diagonal) through 1.2" (17.6mm diagonal). This includes: 1/4", 1/3", 1/2", 1/1.8", 2/3", 1", 1.1", and 1.2". Each lens is designed to fully cover a specific sensor size—using a lens designed for a smaller sensor will cause dark corners (vignetting) on a larger sensor. However, lenses designed for larger sensors work perfectly with smaller sensors, providing a narrower field of view. The standardized mounting (1"-32 thread, 17.526mm flange distance) ensures any C-mount lens fits any C-mount camera.
How do I choose the right focal length for my machine vision task?
Use the formula: Focal Length = (Working Distance × Sensor Width) / Field of View Width. For example, if your inspection camera needs to see a 200mm wide area at 500mm distance with a 2/3" sensor (8.8mm width): f = (500 × 8.8) / 200 = 22mm, so you'd choose a 25mm lens. Wide angle lenses (4-8mm) are ideal for area scanning and navigation. Standard lenses (12-25mm) work well for general inspection and quality control. Telephoto lenses (35-75mm) are perfect for detailed inspection or reading small features from a distance.
What's the difference between 5MP, 12MP, and 25MP lens versions?
The resolution rating indicates the lens's optical quality, specifically how well it can resolve fine details. A 5MP lens is designed for sensors with 3.45μm pixels, 12MP for 2.5μm pixels, and 25MP for 2.2μm pixels. The higher resolution lenses have tighter manufacturing tolerances and better optical designs to maintain contrast at the higher spatial frequencies that smaller pixels can capture. Using a 5MP lens on a 25MP sensor wastes the sensor's capability, while using a 25MP lens on a 5MP sensor won't hurt but costs more than necessary.
How fast do C-mount lenses ship from your US inventory?
All C-mount lenses shown on our website are in stock at our California warehouse and ship same-day for orders placed before 3PM PST. We offer next-day delivery throughout the United States via FedEx and UPS. Volume orders up to 10,000 units typically ship within 1-3 business days depending on quantity. Free shipping is available for orders over $100. International shipping is available with proper export documentation—contact us for quotes on delivery to your country.

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