CCTV lenses are essential for surveillance systems, shaping image quality, coverage, and reliability. Selecting the right lens type ensures optimal performance for specific environments. Below is a concise overview of common CCTV lenses:
1. Fixed-Focal Length (Prime) Lenses
2. Varifocal Lenses
3. Motorized Zoom Lenses
4. Fisheye Lenses
5. Telephoto Lenses
6. Low-Distortion Lenses
1. Fixed-Focal Length (Prime) Lenses
- Function: Fixed FOV with consistent clarity.
- Applications: Indoor monitoring (offices, stores), license plate recognition (ANPR).
- Advantages: Cost-effective, compact, ideal for static setups.
2. Varifocal Lenses
- Function: Manually adjustable focal length (e.g., 2.8–12mm) for flexible FOV and zoom.
- Applications: Spaces with changing needs (hallways, entrances), temporary adjustments.
- Advantages: Versatile, eliminates lens swaps.
3. Motorized Zoom Lenses
- Function: Remote electronic adjustment of focal length and focus.
- Applications: Large-scale surveillance (stadiums, airports), critical infrastructure.
- Advantages: Precise, hands-free control for high-security use.
4. Fisheye Lenses
- Function: Ultra-wide 180°–360° panoramic views with intentional distortion.
- Applications: Wide-area monitoring (warehouses, parking lots), 360° situational awareness.
- Advantages: Maximizes coverage; requires software correction for accuracy.
5. Telephoto Lenses
- Function: Narrow, high-magnification FOV for long-distance observation.
- Applications: Perimeter security (borders, factories), traffic enforcement.
- Advantages: Captures fine details but limited coverage.
6. Low-Distortion Lenses
- Function: Minimizes geometric distortions for accurate imaging.
- Applications: Facial recognition, industrial quality control.
- Advantages: Ensures measurement reliability and reduces errors.