Basler C11-2520-12M-P 12 MP C-Mount Fixed Focal Lens

Technical Overview

C-mount fixed focal lens with 25.4mm focal length, F2.0-F16 aperture, 12 MP for 1.1" sensors.

Key Features

Fixed focal length of 25.4 mm
Aperture range from F2.0 to F16
Designed for 12 MP resolution (140 LP/mm, 3.57 µm pixel size)
Supports image sensors up to 1.1" (17.6 mm image circle)
Equipped with a C-mount for broad camera compatibility
Robust metal housing
Manual focus and iris operation with locking screws
Aperture indicators on iris ring and lens barrel
Offers high contrast imaging
Operating temperature range of -20 °C to 60 °C
Minimum object distance of 0.1 m

Technical Specification Matrix

Parameter	Value
Focal Length	25.4 mm ± 5 %
Aperture Range	F2.0–F16
Aperture with Highest Resolution	F2.6
Image Circle	17.6 mm (1.1" format)
Focus Range	0.1 m to infinity
Minimum Object Distance	100 mm
Optimum Working Distance	0.5 m
Relative Illumination at Full Aperture	70 %
Resolution	140 LP/mm (3.57 µm pixel size)
Optical Distortion	Typical -0.24 %
Angle of View (1.1" Format)	Horizontal: 31.7°, Vertical: 23.5°
Wavelength Range	Visible (400–700 nm)
Back Focal Length	11.33 mm
Flange Back	17.53 mm
Mount	C-mount
Focus/Iris Operation	Manual
Operating Temperature	-20–60 °C (-4–140 °F)
Operating Humidity	10 to 90 % relative humidity, non-condensing
Storage Temperature	-20 to 60 °C (-4 to 140 °F)
Filter Thread	M35.5 x 0.5
Physical Weight (kg)	0.22
Dimensions L x W x H (cm)	0 x 0 x 0

Industrial Applications

1. Automated Quality Inspection of Small Components

This lens is ideal for high-precision automated inspection systems to detect minute defects on small electronic parts, mechanical components, or pharmaceutical products. Its 12 MP resolution and 140 LP/mm capability enable the identification of fine surface imperfections like scratches, cracks, or misalignment, ensuring stringent quality control on manufacturing lines. The C-mount compatibility allows integration with a wide array of industrial cameras.

Problem Solved

Provides accurate and consistent defect detection for small components, reducing human error, increasing inspection speed, and improving overall product quality in high-volume production.

Machine visionQuality controlDefect detectionHigh resolutionC-mountSmall object inspection

2. Robotic Pick-and-Place Guidance

Integrated into robotic vision systems, this lens offers precise visual feedback for automated pick-and-place operations. With a 25.4 mm focal length and a minimum object distance of 0.1 m, it delivers clear images of objects within a compact working area. The durable metal housing ensures reliability in industrial robotic environments, enhancing the accuracy and efficiency of material handling and assembly tasks.

Problem Solved

Enables industrial robots to accurately locate, grasp, and place objects, including small or irregularly shaped items, thereby improving automation precision and throughput in manufacturing and logistics.

Robotic visionPick-and-placeObject localizationIndustrial automationC-mountRobotics

3. Industrial Process Monitoring in Variable Temperatures

The lens is well-suited for continuous monitoring of industrial processes, such as fluid dynamics, material processing, or controlled chemical reactions, especially in environments with temperatures ranging from -20 °C to 60 °C. Its manual focus and iris allow for detailed image acquisition adjustments to specific process conditions, while compatibility with 1.1" sensors offers versatility across various camera models for real-time process oversight.

Problem Solved

Delivers reliable visual data for real-time process analysis, early anomaly detection, and safety monitoring in challenging industrial environments, contributing to process optimization and operational safety without requiring strict climate control for the lens.

Process monitoringIndustrial automationImage acquisitionTemperature resistanceC-mountEnvironmental monitoring