CCTV Lens – CS0412516F3

CS0412516F3 is 4.0mm 3-Megapixel Day/night CCTV lens, 1/2.5″ High-Resolution wide-angle lens, F1.6 Low F-number CS mount lens, IR corrected.

For additional fixed focal and professional surveillance configurations, engineers can explore Towin’s CS-Mount Lenses range.

3MP 4mm CS-Mount Wide Angle IR Corrected CCTV Lens

This 3MP 4mm CS-mount wide angle CCTV lens provides a 67° horizontal field of view, F1.6 aperture, and IR-corrected optical performance for reliable CCTV surveillance. Its balanced field of view and 3MP imaging capability make it suitable for fixed-position security cameras covering entrances, indoor spaces, commercial areas, and general monitoring zones.

CS-Mount Wide Angle CCTV Lens Core Highlights

• 4mm fixed focal length provides stable framing for dedicated CCTV installations.
• 67° horizontal FOV balances broad scene coverage with a controlled perspective.
• 3MP resolution supports detailed security imaging for general surveillance.
• F1.6 aperture provides a relatively bright optical configuration for changing indoor lighting.
• IR-corrected optics support consistent focus in visible and near-infrared imaging.

CS-Mount Wide Angle CCTV Lens Applications

Core Application Scenes

This 3MP 4mm CS-mount CCTV lens is designed for security installations that require a practical balance between coverage and image detail. With a 67° horizontal field of view, it provides wider scene coverage than standard medium-focal lenses while maintaining a more controlled perspective than ultra-wide or fisheye optics.

The lens is particularly suitable for office entrances, reception areas, retail counters, small commercial spaces, indoor corridors, and access-monitoring points. Its 4mm focal length can capture the surrounding environment while still providing useful detail for routine security observation.

The 0.2m minimum object distance also gives installers flexibility when the camera must observe relatively nearby subjects. Manual focus allows the optical system to be adjusted during installation according to the actual camera position and target area.

With its F1.6 aperture and IR-corrected optical design, the lens can also be used in CCTV systems that experience changing illumination or switch between visible-light and near-infrared imaging.

For selecting the appropriate focal length according to sensor format and required coverage, engineers can refer to Towin’s Lens Selection Guide.

Compatible Device List

• 1/2.5″ 3MP CCTV cameras: Designed for security camera systems using 1/2.5″ image sensors and 3MP imaging.
• CS-mount security cameras: Compatible with camera bodies using a CS mounting interface.
• Office and commercial surveillance cameras: Suitable for reception areas, entrances, corridors, and general indoor monitoring.
• Retail security cameras: Useful for monitoring counters, customer areas, entrances, and selected sections of a store.
• Access-monitoring cameras: The 67° horizontal FOV provides practical coverage for defined access points.
• Day/night CCTV systems: IR correction supports applications using near-infrared illumination during nighttime operation.

For integrated security deployments, this lens can be considered for Towin’s Smart Security solutions.

Field-of-View & Installation Considerations

The lens provides:

• 78° diagonal FOV
• 67° horizontal FOV
• 52° vertical FOV

This field-of-view combination makes the lens suitable for installations where a relatively broad image is required without the extreme perspective of a fisheye lens.

Actual scene coverage depends on the 1/2.5″ sensor dimensions and the camera’s installation distance. Engineers can use Towin’s Focal Length Calculator to estimate the required focal length for a specific working distance and target area.

The lens is specified as IR Corrected, but no numerical distortion value is provided. Therefore, it should not be marketed as a Low Distortion Lens without additional optical test data. For applications where distortion is an important selection factor, the Distortion Guide provides useful optical selection guidance.

Designed for 3MP CCTV surveillance, office and retail security, entrance monitoring, indoor commercial spaces, and fixed-position camera systems requiring a 4mm CS-mount wide angle lens.

Frequently Asked Questions

Q: What type of lens is this 4mm CS-mount lens?
A: It is a 3MP fixed focal CCTV lens with a 4mm focal length, CS mount, F1.6 aperture, manual focus, and IR-corrected optical performance.

Q: What is the field of view of this lens?
A: With a 1/2.5″ image format, the specified FOV is 78° diagonal, 67° horizontal, and 52° vertical.

Q: Is this lens a wide angle lens?
A: Yes. Its 67° horizontal field of view provides broad coverage and supports its positioning as a wide-angle CCTV lens.

Q: Is this a fisheye lens?
A: No. The supplied 78° diagonal and 67° horizontal FOV represent a conventional wide-angle configuration rather than the extreme field of view normally associated with fisheye optics.

Q: Is the focal length adjustable?
A: No. The focal length is fixed at 4.0mm. The lens uses manual focus for installation adjustment.

Q: What camera sensor is this lens designed for?
A: The specified image format is 1/2.5″, with a 3MP resolution rating.

Q: What is the benefit of the F1.6 aperture?
A: F1.6 provides a relatively bright optical configuration, which can be useful for indoor CCTV environments and scenes with changing illumination.

Q: What does IR corrected mean?
A: IR correction is designed to reduce focus shifts between visible and near-infrared wavelengths, helping maintain consistent focus in day/night surveillance systems.

Q: What is the minimum object distance?
A: The specified M.O.D. is 0.2m, allowing the lens to focus on relatively close subjects when required by the camera installation.

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