In the world of optics, there is a dirty little secret: The "Center Sweet Spot."

Most standard lenses look great in the middle of the image. But look closely at the corners. The image gets soft, the contrast drops, and details turn into "pixel mush." For a consumer taking a landscape photo, this might be artistic. For an industrial engineer designing a defect detection system or a license plate reader, it is a failure.

If your lens is 12MP in the center but only 2MP at the edges, you don't have a 12MP system. You have a problem.

Enter the JSD3122. This M12 lens was engineered with one obsession: Uniformity. Here is how it guarantees ultra-high resolution across the entire frame, from the dead center to the furthest edge.

1. The 1/2" Image Circle Advantage

The number one reason for blurry edges is a lens that is too small for the sensor. When a lens barely covers the sensor area, light quality degrades rapidly toward the perimeter (a phenomenon known as MTF drop-off).

The JSD3122 is built differently. It features a robust 1/2" Image Circle.
By designing the optics to cover a large 1/2" format, this lens ensures that the "sweet spot" isn't just a spot—it’s the whole image. It delivers high-contrast light to every pixel on your sensor, eliminating the dark, soft corners that plague lesser M12 lenses.

2. True 12MP Resolving Power

"12MP" isn't just a marketing buzzword for the JSD3122; it's a technical benchmark.
This lens is ground to resolve the fine pixel pitch of modern high-resolution sensors. Whether you are inspecting a microchip in the bottom-left corner of the frame or reading a barcode in the top-right, the JSD3122 maintains critical sharpness.

Result: No more "safe zones." You can utilize the full Field of View for data capture.

3. Fighting the Stretch (Distortion < -1.54%)

High distortion kills resolution. When a wide-angle lens stretches the image to fit the frame (the fish-eye effect), it spreads the pixels thin at the edges, destroying detail.
The JSD3122 combats this with a low-distortion design (< -1.54%).
By keeping the geometry linear, the lens preserves pixel density evenly across the 92° Field of View. Straight lines stay straight, and detailed textures remain crisp, ensuring your AI algorithms get consistent data regardless of where the object is located in the frame.

4. Precision in a Small Package

Achieving this level of optical consistency usually requires bulky, heavy glass. The JSD3122 achieves it in a compact M12 form factor with a TTL (Total Track Length) of just 20.49mm.

EFL: 3.94mm

Aperture: F/2.2
It combines the portability of an S-Mount lens with the optical rigor of a professional C-Mount system.

5. Not for the Average User

It is important to note: The JSD3122 is not for consumer cameras.
It is designed for professionals who cannot afford optical aberrations. It is for the vision system integrator, the drone mapping specialist, and the industrial automation engineer.

The Bottom Line

A chain is only as strong as its weakest link, and an image is only as good as its blurriest corner.

Don't let optical fall-off compromise your vision system. Choose the JSD3122 for true, edge-to-edge 12MP performance. See the whole picture, clearly.

Our official email address: info@jsdoptical.com