Night vision CCTV lens: Selection Guide
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Table of Contents
Key Takeaways
- Night vision CCTV lenses support 850nm/940nm IR and feature day-night confocal to prevent focus shift.
- Key selection factors: IR wavelength, aperture (F1.2–F.16 recommended), sensor size, resolution, mount type and environmental durability.
- 850nm lenses offer longer IR range; 940nm lenses are fully covert with no red glow for secure sites.
- TOWIN provides professional Night vision CCTV lenses, including M12/C/CS mounts, with customization and fast shipping.
- Ordinary CCTV lenses cannot replace Night vision CCTV lenses, as they cause blurriness and focus shift in low-light conditions.
Introduction
Night vision clarity is the biggest pain point for 24/7 security surveillance. Blurry images, focus shift under IR light, uneven lighting, and short night vision distance can make your entire monitoring system ineffective. The key to solving all these problems lies in one core component: the Night vision CCTV lens.
What Is a Night Vision CCTV Lens?
- Purpose-built for 24/7 surveillance, compatible with IR illumination systems.
- Enables crisp imaging in low-light or dark environments.
- Solves focus drift between visible light and infrared (unlike standard CCTV lenses) via advanced optical engineering.
How Does a Night Vision CCTV Lens Work?
- Standard CCTV lenses: Misaligned focal points for visible/IR light → blurry images at night when IR activates.
- TOWIN night vision lenses: Use specialized optical glass, ED lenses and apochromatic tech for day-night confocal alignment → stable, sharp 24/7 imaging.
- Multi-coating tech enhances 850nm/940nm IR transmittance (invisible to human eye), reducing glare and improving night footage clarity.
Core Advantages of TOWIN Night Vision CCTV Lens
- No focus drift: Confocal design ensures seamless day-night transition, no manual adjustment needed.
- Superior IR transmittance: Multi-coating minimizes glare, delivers brighter, less noisy night images.
- Broad compatibility: Works with CCD/CMOS cameras, IR-CUT switches; fits various surveillance scenarios.
- Robust durability: All-glass lenses + metal bases, IP65/IP67 waterproof/dustproof, resistant to harsh outdoor conditions.
- Versatile mounting: Available in M12/S-Mount, C-Mount, CS-Mount to fit different cameras and installations.
M12 Lens with IR Cut Filter
Key Parameters of Night Vision CCTV Lens
The performance of a Night vision CCTV lens is determined by its core parameters. Understanding these parameters is the key to selecting the right lens for your project.
IR-Related Key Parameters
- IR Wavelength: 850nm (commonly used, slight red glow) and 940nm (no red glow, covert). Choose according to the confidentiality requirements of the surveillance scene.
- IR Corrected: Must support day-night confocal (True IR), ensuring no focus shift when IR lights are on/off.
- Coating: Multi-Coating (Muti-Coating) to improve IR transmittance, reduce reflection and glare, and enhance night imaging effect.
Basic Optical Parameters
- Target Size: 1/2.5″, 1/3″, 1/2″, 2/3″ — must be ≥ camera sensor to prevent vignetting.
- Pixel: 2MP/5MP/8MP/12MP — match camera resolution for clear imaging.
- Aperture (F‑value): F1.2/F1.4/F1.6 (large aperture preferred) — smaller F‑value = more light & better night vision.
- Focal Length: 2.8/3.6/4/6/8/12/16/25mm — shorter = wider angle & shorter distance; longer = narrower angle & longer distance.
- Mount Type: M12/S-Mount (PCB cameras), C-Mount (industrial/ITS), CS-Mount (CCTV/IP cameras) — match camera mount.
- Distortion: Low distortion <1%–3% — recommended for surveillance to avoid image warping.
Environmental Reliability Parameters
- Operating Temperature: -20℃~+60℃ — adapts to most outdoor environments, stable in extreme cold/heat.
- Waterproof & Dustproof: IP65/IP67 — essential for outdoor surveillance to protect against water and dust.
- Material: All-glass lenses (high transmittance) + metal bases (high durability) — superior to plastic lenses for long-term use.
Parameter Comparison Table: Night Vision CCTV Lens vs Ordinary CCTV Lens
Parameters | Ordinary CCTV Lens | Night Vision CCTV Lens | Purchase Suggestion |
|---|---|---|---|
IR Compatibility | No support/weak support | Specialized for 850nm/940nm IR | Choose Night vision CCTV lens for 24/7 monitoring |
Day-Night Focus | Easy focus shift, blurriness | Day-night confocal, no focus shift | Reduce maintenance, ensure stable imaging |
Night Imaging Effect | Dark, noisy, uneven lighting | Bright, clear, uniform lighting | Prioritize large aperture (F1.2-F1.6) |
Coating Technology | Ordinary coating, low IR transmittance | Multi-Coating, high IR transmittance | Essential for night vision clarity |
Applicable Scenarios | Indoor/daytime only | Outdoor/24-hour surveillance | All security projects need Night vision CCTV lens |
TOWIN Night Vision CCTV Lens: Mount Type Comparison Table
Mount Type | Key Features | IR Lens Models (TOWIN) | Applicable Cameras | Typical Scenarios |
|---|---|---|---|---|
M12/S-Mount | M12X0.5 thread, miniature, PCB-mountable, low distortion, compact | PCB cameras, miniature CCTV cameras, automotive cameras | Indoor, elevators, convenience stores, shops, covert surveillance | |
C-Mount | Flange focal distance 17.526mm, industrial-grade, high resolution, stable | Machine Vision cameras, ITS traffic cameras, industrial cameras | Roads, parking lots, industrial sites, machine vision | |
CS-Mount | Flange focal distance 12.526mm, megapixel, IR-corrected, auto iris option | CCTV, Network, IP cameras | Residential areas, shops, parks, outdoor surveillance |
Scene-Based Selection Guide for Night Vision CCTV Lens
Different surveillance scenarios have different requirements for night vision CCTV lenses. Below is a scenario-based selection guide to help you choose the right lens quickly with TOWIN’s official hot models:
1. Small Spaces / Indoor / Elevators / Convenience Stores
- Focal Length: 2.8mm / 3.6mm (wide angle, full coverage)
- Aperture: F1.4–F2.0 (strong low-light performance)
- Mount Type: M12/S-Mount (compact, easy to install)
- IR Wavelength: 850nm (cost-effective for general night vision)
- Recommended TOWIN Models:
- S16011802820 – 12MP, 16mm, M12, IR Corrected, Low Distortion
- CCL122914MP – 29mm telephoto, F1.4, M12, ultra-low distortion, low-light sensitive
2. Shops / Homes / Corridors
- Focal Length: 4mm / 6mm (balance of view angle and distance)
- Aperture: F1.6 (clear night imaging, low noise)
- Key Requirement: Low distortion
- Mount Type: M12/S-Mount or CS-Mount
- Recommended TOWIN Models:
- S062212516F5 – 6–22mm manual zoom, 5MP, M12, IR Corrected, F1.6
- CS371611815A8 – 3.7–16mm motorized zoom, 8MP, CS-Mount, DC Auto Iris, F1.5
3. Parks / Roads / Parking Lots
- Focal Length: 8mm / 12mm / 16mm+ (long-distance monitoring)
- Aperture: F1.2–F1.4 (max light intake for distant details)
- Mount Type: C-Mount or CS-Mount (industrial‑grade stability)
- Environmental: IP65/IP67 waterproof & dustproof
- Recommended TOWIN Models:
- C3511014M12IR – 35mm, 12MP, C-Mount, F1.4, IR Corrected, low distortion
- CS371611815A8 – 3.7–16mm motorized zoom, CS-Mount, 8MP, IR Corrected
4. Covert Surveillance (Prisons / Vaults / Confidential Areas)
- IR Wavelength: 940nm (no red glow, fully covert)
- Focal Length: 6mm / 8mm (clear key-area imaging)
- Key Requirement: High resolution & stable performance
- Mount Type: M12/S-Mount (small, easy to hide)
- Recommended TOWIN Models:
- S16011802820 – 12MP, M12, IR Corrected, low distortion, compact size
- S062212516F5 – 6–22mm zoom, 5MP, M12, IR Corrected, flexible viewing
5. Automotive / Industrial Machine Vision
- Mount Type: M12 (automotive) / C-Mount (industrial FA/ITS)
- Key Requirement: Wide temperature resistance & anti‑vibration
- IR Wavelength: 850nm (long outdoor night vision)
- Recommended TOWIN Models:
- C3511014M12IR – 12MP, C-Mount, F1.4, industrial‑grade stability
- CCL122914MP – M12, F1.4, low-light sensitive, durable structure
IR corrected C-mount ITS traffic CCTV lens
5-Step Selection Method for Night Vision CCTV Lens
For global buyers who are not familiar with lens parameters, TOWIN provides a simple 5-step selection method to help you choose the right Night vision CCTV lens quickly:
- 1. Confirm camera sensor size and resolution. Lens format ≥ sensor size, with matching resolution.
- 2. Define monitoring distance and angle: shorter focal length = wider view; longer focal length = longer distance.
- 3. Choose IR wavelength & aperture: 850nm for long range, 940nm for covert; F1.2–F1.6 for better night vision.
- 4. Match lens mount: M12 for compact cameras, C/CS for industrial/security cameras.
- 5. Check environment: IP65/IP67 for outdoor use, low-temperature resistance for cold areas.
FAQs
Q1: Can ordinary CCTV lenses be used for night vision?
A1: No. Ordinary lenses lack IR correction, causing focus shift and blurry night images. Only professional day-night confocal lenses ensure clear day and night imaging.
Q2: How to choose IR wavelength, aperture and F‑value?
A2: 850nm for longer night vision distance with faint red glow; 940nm for fully covert surveillance with slightly shorter range. Smaller F‑value means larger aperture and better low-light performance; F1.2–F1.6 is recommended for excellent night vision.
Q3: How to select the right mount and outdoor specifications?
A3: M12 for small PCB board cameras; C‑mount for industrial/machine vision; CS‑mount for most CCTV/IP cameras. Outdoor use requires IP65/IP67 waterproof and dustproof lenses to withstand harsh environments.
Q4: Does TOWIN support customized night vision lenses?
A4: Yes. As a professional optical manufacturer, TOWIN provides custom solutions including focal length, aperture, IR wavelength, mount type and more, with fast prototyping and stable delivery.
Conclusion
The Night vision CCTV lens is the core component of 24-hour security surveillance. Choosing the right lens can solve the pain points of blurriness, focus shift and poor night vision, ensuring stable and clear imaging day and night. As a professional optical lens supplier, TOWIN adheres to the concept of “PROFESSIONAL-ALL-EASY-FAST”, providing a full range of Night vision CCTV lenses (M12/C/CS mounts) with high quality, customization support and fast shipping.
Whether you need lenses for indoor small spaces, outdoor large areas or covert surveillance, TOWIN can provide the most suitable solution for you. Contact us today to get a free quote and professional selection advice!
Contact Us: info@towin-elec.com
