Wide-angle lenses are usually a compromise. You want to see more? You usually have to accept dark edges, blurry corners, or messy images. But in the world of industrial sensing and high-end security, "compromise" is not in the vocabulary.

Enter the JSD3122.

This isn't the lens found in a budget webcam. This is a 5MP optical instrument designed for engineers who need to capture the entire world in a single frame—even when the lights go out. Today, we are peeling back the layers to see how this M12 lens achieves the impossible balance of ultra-wide coverage and extreme brightness.

1. The Challenge: 181° Without the Chaos

Most M12 lenses stop at 120° or 140°. The JSD3122 pushes the envelope to a staggering 181° Field of View (FOV).

The "Secret" Design: Achieving 181° means the lens can see "behind itself" slightly. With an Effective Focal Length (EFL) of 2.16mm, it captures a complete hemispherical view.

Controlled Precision:While fisheye lenses inherently curve the world, the JSD3122 is engineered with optical distortion controlled to <-3.17%(relative to its projection mapping). This means that while you get the panoramic view, you don't get the "mushy" pixel data common in cheap lenses. It is crisp, sharp 5MP data from edge to edge, ready for your de-warping algorithms.

2. Breaking the "Darkness" Barrier: The F1.2 Aperture

Here is where the JSD3122 truly shows off its industrial pedigree.
Standard wide-angle lenses struggle to gather light, often sitting at F2.0 or F2.8. The JSD3122 features a massive F/NO 1.2 aperture.

Why it matters: F1.2 lets in significantly more light than standard lenses. It transforms a dark warehouse or a moonlit road into a clear, visible scene.

The Result:Your sensor (1/2.7") gets a cleaner signal, less noise, and better data, reducing the need for artificial lighting or heavy post-processing.

3. Industrial Strength, Compact Form

Consumer lenses are built to be cheap. The JSD3122 is built to work.

Fit for Purpose:It packs this high-performance glass into a TTL (Total Track Length) of just 17.41mm.

B2B Focused:This lens is strictly for non-consumer applications—think 360° security cameras,automotive blind-spot detection,industrial robotics, and VR content creation. It uses a standard M12 thread, making it easy to integrate into ruggedized housings.

The Conclusion

The JSD3122 proves that you don't need a bulky DSLR lens to get professional optical performance. By combining a 181° panoramic view with a super-bright F1.2 aperture, it offers a "clear vision" solution that standard lenses simply can't touch.

If your project requires seeing the whole picture in low light, the JSD3122 is the engineering marvel you’ve been looking for.

If you have any lens requirements, please contact us via email: info@jsdoptical.com

Technical Specifications (JSD3122)

Resolution:5MP (High Definition)

Aperture:F/1.2 (Ultra-Low Light Capable)

Field of View:181° (Full Panoramic/Fisheye)

EFL:2.16mm

Distortion:<-3.17%

Sensor Format:1/2.7"

Mount:M12