What sensor format does the M12 2.18mm fisheye lens support?

The PL-WA02124B-M12 is optimized for 1/2.7-inch sensors with a 6.3mm maximum image circle, a 2.18mm ±5% effective focal length and a CRA below 20.43° for good color shading alignment.

Does the 185 degree fisheye lens require dewarping?

Yes. With TV distortion of -32.0%, the lens produces a native fisheye image. Integrators typically add ISP dewarping or perspective correction for standard viewing, while users who want maximum coverage can keep the native fisheye look.

Is this M12 wide angle lens suitable for automotive and security cameras?

Yes. The 185° diagonal FOV, 2G3P+IR hybrid stack, F2.4 fixed aperture and M12 P0.5 mount suit dashcam, automotive surround-view, security dome and turret, action camera and machine vision modules.

Can I request a sample or OEM/ODM wholesale quote?

Shanghai SILK Optical Technology supports OEM and ODM projects with sample evaluation, flexible volume planning and production consistency. Contact the engineering team with your sensor model, target volume and housing constraints.

M12 2.18mm Fisheye Lens

The M12 2.18mm Fisheye Lens (Model PL-WA02124B-M12) is an ultra-wide board optic engineered for compact imaging systems requiring maximum coverage. Designed for 1/2.7-inch sensors, it delivers a true fisheye 185° diagonal, 152° horizontal, and 83.6° vertical field of view. Featuring a 2G3P+IR optical stack, an F2.4 fixed aperture, and an M12 P0.5 mount, this lens combines a 14.5mm total track length with cost-efficient optical architecture. It is the ideal choice for automotive surround view, security surveillance, action cameras, and machine vision applications.

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Product Description

M12 2.18mm Fisheye Lens

PL-WA02124B-M12 from Shanghai SILK Optical Technology is an ultra-wide board optic engineered for compact imaging systems. Built around a 2.18mm effective focal length and a true 185° fisheye field of view, it delivers maximum coverage for automotive, security, and machine vision applications.

PL-WA02124B-M12 Specification

The following table details the core technical parameters, optical characteristics, and mechanical dimensions.

NO.	ITEM	CONTENT
1	TTL (Total Track Length)	14.5 ± 0.2 mm
2	EFL (Effective Focal Length)	2.18 ± 5% mm
3	F/NO (Aperture)	2.4 ± 5%
4	(M)BFL (Mechanical Back Focal Length)	2.7 ± 0.2 mm
5	CONSTRUCTION	2G3P + IR
6	MAX IMAGE CIRCLE	Φ 6.3 mm
7	For Sensor	1/2.7"
8	Field of View (Diagonal)	185°
9	Field of View (Horizontal)	152°
10	Field of View (Vertical)	83.6°
11	TV Distortion	-32.0%
12	Relative Illumination	46.0%
13	CRA (Chief Ray Angle)	< 20.43°
14	Mount (Interface)	M12

Mechanical Drawings

M12 2.18mm Fisheye Lens Mechanical Drawing

Performance Advantages

Wider Coverage with Fewer Cameras

One 185° optic can replace multiple narrow-angle cameras in room monitoring, vehicle surround view, and shelf-level inspection, reducing BOM cost, cabling, and installation time.

Compact & Lightweight

At 14.5mm total length, the lens supports slim camera modules and embedded vision devices. Low mass reduces stress on the lens holder and helps maintain focus after vibration.

Cost-Efficient Architecture

The 2G3P hybrid formula uses glass where thermal stability matters and plastic aspheres to reduce polishing costs, delivering a competitive price for high-volume programs.

Natural Color & Low Light

The integrated IR-cut filter prevents color washout during daylight, while the F2.4 fixed aperture supports usable indoor exposure without the size penalty of a larger iris.

Detailed Application Areas

Industry	Application Details
Automotive & Surround View	Rear-view, side-view, and liftgate modules. The 185° coverage and hybrid stack tolerate vibration and temperature swings in exterior installations.
Security & Surveillance	Corner-mounted room coverage, corridor monitoring. Fits bullet, dome, and turret housings, with dewarping software presenting a normal perspective.
Dashcams & Cabins	Driver/cabin monitoring and recording adjacent lanes. The short TTL makes it practical for dashboard and mirror modules mounted close to the windshield.
Action Cams & Robots	Captures wide scenes with a light optical block. On AGVs, the wide view supports obstacle detection and docking for 360° capture rigs.
Machine Vision & IoT	Conveyor monitoring, bin picking, and smart home doorbells. Supports calibration and dewarping for repeatable geometry in embedded devices.

ShangHai SILK Optical Technology CO., LTD supports OEM and ODM projects with flexible volume planning, sample evaluation, and production consistency. For inquiries, please contact our engineering team.