Fisheye Lens – S4121020F-1

S4121020F-1 is 1.6mm 5-Megapixel Fisheye CCTV lens with 209° diagonal F.O.V., F2.0 aperture, M12 mount, Suitable for security Surveillance.

M12 1.6mm 5MP 209° F-Theta Fisheye Lens

This 1.6mm M12 fisheye lens delivers an ultra-wide 209° field of view with 5MP resolution, F2.0 aperture, and F-Theta distortion below -5.8%, making it suitable for panoramic imaging, embedded vision, robotics, and ultra-wide scene capture.

Product Core Highlights

• 209° Ultra-Wide FOV — Captures an extremely broad scene with 209° diagonal, horizontal, and vertical coverage.
• 5MP Resolution — Supports detailed image acquisition for high-resolution embedded vision systems.
• 1.6mm Focal Length — Provides very wide spatial coverage for compact camera designs.
• F2.0 Fixed Aperture — Offers a stable optical configuration for continuous wide-angle imaging.
• F-Theta Optical Design — F-Theta distortion below -5.8% provides controlled fisheye image mapping for applications requiring predictable wide-angle projection.
• IRCF Configuration — Integrated IR cut filtering helps maintain more natural visible-light image reproduction under standard imaging conditions.

M12 1.6mm 209° Fisheye Lens Applications

Core Application Scenes

The combination of a 1.6mm focal length, 209° FOV, 5MP resolution, and 0.2m minimum object distance makes this M12 fisheye lens suitable for applications where maximum scene coverage is more important than conventional rectilinear image geometry.

• Panoramic and Surround-View Imaging — The 209° field of view allows a single compact camera to capture an exceptionally broad surrounding scene, reducing blind areas in close-range monitoring systems.
• Robotics Vision — Suitable for mobile robots, autonomous platforms, and compact robotic systems that need wide environmental awareness for navigation and obstacle detection.
• Embedded AI Vision — The 5MP resolution provides sufficient image detail for AI-based scene analysis, object detection, and environmental perception when paired with a compatible 1/2.5″ sensor.
• Smart Security Cameras — The ultra-wide optical coverage can be used for indoor monitoring, compact panoramic cameras, and applications where a broad viewing area is required from a fixed camera position.
• Industrial Area Monitoring — The 0.2m M.O.D. makes the lens suitable for relatively close-range wide-area imaging, including equipment surroundings, workspaces, and compact inspection environments.
• Immersive and Panoramic Imaging — The fisheye optical configuration is suitable for systems requiring very wide image acquisition for panoramic processing or image stitching.

For applications requiring a conventional machine vision lens with controlled geometric distortion rather than fisheye projection, users can refer to the Low Distortion Lens range.

The lens can also be evaluated together with the FOV Calculator when determining whether its ultra-wide coverage matches the target imaging area.

Compatible Device List

• 1/2.5″ image sensor cameras
• 5MP embedded camera modules
• Panoramic camera systems
• Mobile robot vision cameras
• Autonomous robotic platforms
• AI vision camera modules
• Smart security cameras
• Industrial wide-area monitoring cameras
• Compact panoramic imaging devices
• Embedded computer vision systems

Designed for ultra-wide panoramic and embedded vision applications.

Frequently Asked Questions

Q: What is the field of view of this 1.6mm M12 fisheye lens?
A: The lens provides a 209° field of view in diagonal, horizontal, and vertical directions when used with the specified 1/2.5″ image format.

Q: Is this lens a fisheye lens?
A: Yes. The 1.6mm focal length and 209° FOV clearly place this lens in the fisheye category. Its F-Theta distortion specification is also characteristic of an ultra-wide fisheye optical design.

Q: What does the F-Theta distortion of < -5.8% mean?
A: F‑Theta distortion characterizes a lens’s angle‑to‑image‑position mapping. Its rating reflects deviation from ideal F‑Theta projection, not the low‑distortion rectilinear profile for precision measurement.

Q: Is this a low-distortion lens?
A: No. This lens should be classified as a fisheye lens rather than a low-distortion lens. Its 209° field of view is designed for extremely wide scene coverage.

Q: What sensor format is this lens designed for?
A: The specified field of view is measured at a 1/2.5″ image format. The actual usable image performance should be verified against the sensor’s active image circle and optical requirements.

Q: What does the M12x0.5 mount mean?
A: M12x0.5 is a standard 12 mm threaded mount widely adopted for compact camera modules and embedded vision, enabling lens integration into small‑form‑factor camera designs.

Q: Does the lens have IR correction?
A: The specification states “With IRCF,” which indicates an IR cut filter configuration. This should not be interpreted as an IR-corrected optical design. For applications requiring focus consistency between visible and near-infrared wavelengths, an IR Corrected Lens should be considered.

Q: What is the minimum object distance of this lens?
A: The specified M.O.D. is 0.2m, meaning the lens is designed to focus from approximately 0.2 meters under the specified optical configuration.

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