In vision system design, when the core requirement of the application scenario is "seeing wide" rather than "seeing far," a lens capable of providing an extreme field of view becomes key. The JSD3925 is born for this purpose. With its astonishing field of view and unique optical characteristics, it focuses on covering vast areas that are beyond the reach of most conventional lenses. Below, we will delve into each of its parameters to reveal its suitability for specific, unique applications.

1. Extreme Field of View: 3.05mm Focal Length & 122° Field of View

The ultra-short 3.05mm focal length is the soul of the JSD3925, directly resulting in a remarkable 122° diagonal field of view. This angle far exceeds that of standard wide-angle lenses (typically below 90°), entering the realm of ultra-wide-angle and even "fisheye" lenses.

Core Advantage:It can compress an extremely wide scene into a single image, achieving nearly dead-angle-free coverage with a single lens. For example, in a small room, one device can capture a panoramic view of the entire space.

2. Signature Optical Characteristic: <-10% Barrel Distortion

A distortion value of less than -10% is the most prominent feature of the JSD3925. Such a high negative value indicates this lens produces a strong fisheye effect or barrel distortion. Straight lines in the image (especially towards the edges) will appear significantly curved outwards.

Correct Understanding:This is not a flaw but an essential optical trade-off made to achieve the maximum field of view at an extremely short focal length. This distortion can be digitally "corrected" in post-processing to restore the true shapes of objects, but the correction process will crop and lose some of the peripheral field of view.

3. Good Light Intake & Compact Design: F2.6 Aperture & 17mm TTL

The large F2.6 aperture ensures excellent light intake, which is crucial for ultra-wide-angle monitoring scenarios in generally moderate lighting conditions like indoors or parking lots, helping to improve image brightness in low light. Simultaneously, its total optical length of 17mm makes the structure very compact and easy to integrate into various devices.

4. Clarity for Basic Needs: 2MP Resolution & 1/2" Image Circle

The JSD3925 supports 2-megapixel resolution (typically corresponding to 1080p Full HD) and is matched with a 1/2-inch sensor image circle. This means it is not designed for capturing extreme detail but for providing clear global situational awareness within its vast field of view. For applications like detecting intrusions or estimating general pedestrian flow, 2 megapixels is sufficient.

Typical Application Scenarios

The design goal of the JSD3925 is very clear: everything serves "breadth." It is highly suitable for the following scenarios:

Panoramic Surveillance & Situational Awareness:Ideal for spaces like small shops, cashier counters, living rooms, and elevator cars, where a single lens can achieve dead-angle-free panoramic coverage.

Vehicle Surround View Systems:Used as one of the cameras around the vehicle body for stitching a 360° bird's-eye view; the strong distortion can be effectively corrected by software.

Virtual Reality & Panoramic Imaging:Serves as hardware for entry-level VR content creation or panoramic photo capture.

Smart Home:For example, in smart central control devices that require a camera to see the entire room's environment and occupant activity.

Selection Considerations

Choosing the JSD3925 means you need to accept its inherent optical trade-offs:

Distortion Tolerance:Your application must be able to tolerate the strong barrel distortion or correct it via software. This lens is not suitable if high-precision measurement at the image edges is required.

Detail Requirements:It is suitable for overall monitoring but not for identifying distant facial details or reading small text. If both wide-angle coverage and close-up detail are needed, a multi-camera setup (e.g., wide-angle + zoom) should be considered.

The JSD3925 is a distinctive "specialist." It uncompromisingly pursues an extreme 122° field of view, accepting <-10% distortion and 2MP resolution as the necessary trade-offs to achieve this goal. It is not a universal solution, but in applications requiring "seeing the whole picture at a glance," it offers a highly cost-effective and compact solution. If your primary goal is to see everythingrather than see every detail, then the JSD3925 will be your ideal choice.