2.18mm wide angle lens

1. Product Brief

This high-performance M12 fisheye lens is engineered by ShangHai SLIK Optical Technology CO., LTD to deliver seamless panoramic monitoring with an ultra wide angle field of view. Designed for 1/2.7” image sensors, this ultra wide angle lens adopts a mature 2G3P+IR optical structure, balancing compact size and all-day imaging capacity. It features a 2.18mm effective focal length, F2.4 fixed aperture and 185° diagonal field of view, enabling single-camera wide-area coverage without stitching multiple cameras. As a reliable IR corrected lens, it maintains consistent image quality under visible and infrared light for day-night surveillance scenarios. The total track length is controlled at 14.5±0.2mm, supporting miniaturized camera module integration. Strict optical calibration delivers 46.0% relative illumination and controlled CRA under 20.43°, greatly reducing vignetting and matching mainstream CMOS sensors. ShangHai SLIK Optical Technology CO., LTD provides stable mass production and customizable optical solutions for global clients using this mature panoramic lens platform.

2. Detailed Product Description

Parameter

1.Optical specifications: EFL 2.18±5%, F2.4±5%, mechanical back focal length 2.7±0.2mm. The Φ6.3mm maximum image circle precisely matches 1/2.7” sensors to avoid ineffective peripheral imaging.

2.Optical structure: 2G3P+IR design integrates glass and plastic elements with infrared correction coating, balancing cost, weight and optical performance of this M12 fisheye lens.

3.Field of view: 185° diagonal, 152° horizontal, 83.6° vertical ultra wide coverage. It realizes near full surrounding view and reduces camera quantity for wide-area monitoring.

4.Imaging indicators: TV distortion -32.0%, relative illumination 46.0%, CRA <20.43°. Optimized chief ray angle fits most CMOS sensors, lowering dark corner risks for the ultra wide angle lens.

5.Mechanical design: Standard M12 mount and 14.5mm compact TTL, easy assembly inside miniature cameras.

Performance Advantages

1. Panoramic coverage capability: The 185° ultra-wide view eliminates blind zones, a core strength of this panoramic lens for space monitoring.

2. Day-night IR compatibility: As an IR corrected lens, it avoids focal shift between visible and IR light, delivering sharp images both daytime and under infrared night vision.

3. Uniform edge brightness: 46.0% relative illumination improves peripheral image brightness compared with ordinary fisheye lenses, reducing obvious dark corners.

4. Compact modular design: Short TTL and standard M12 interface support thin camera housings, ideal for small embedded vision equipment.

5. Stable mass production: Manufactured by ShangHai SLIK Optical Technology CO., LTD, the lens undergoes strict optical testing to guarantee consistent performance across batches.

Application Field

1. Home & commercial security: Indoor panoramic surveillance cameras, doorbell cameras, retail anti-theft monitoring using this M12 fisheye lens.

2. Vehicle auxiliary vision: Car surround view systems, vehicle-mounted wide-angle monitoring where the ultra wide angle lens covers blind areas around automobiles.

3. Industrial embedded vision: Mini industrial inspection cameras, machine vision modules requiring large field coverage.

4. Smart IoT devices: Smart home cameras, panoramic video conference equipment relying on IR corrected lens for 24-hour continuous capture.

5. Public monitoring: Small panoramic security cameras for elevators, corridors and small public spaces, helping customers cut hardware deployment costs.