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About OOSSXX Security

OOSSXX is a global registered trademark. which was established in 1999. We focus on small surveillance systems with less than 10 cameras, mainly providing state-of-the-art camera surveillance products for homes, shops, offices, and other places.

Selecting the Right Focal Length for Surveillance Cameras: Insights from OOSSXX Surveillance

When it comes to surveillance cameras, choosing the right focal length is crucial for optimal performance and image quality. At OOSSXX Surveillance, we understand the importance of selecting the perfect focal length to meet your specific security needs. In this article, we will provide valuable insights into focal length selection and its impact on surveillance camera performance. Whether you're looking for a high-resolution 4K IP camera system or a reliable wired security camera system, we have you covered.


Understanding Focal Length: Focal length refers to the distance from the optical center of a lens to the focal point where parallel light rays converge. In surveillance cameras, it also refers to the distance between the lens and the CCD/CMOS image sensor. The focal length determines the image size, field of view, and depth of field in the captured footage.



Effects of Different Focal Lengths: Today's leading surveillance cameras, such as our advanced IP cameras, offer a range of focal lengths, including 2.8mm, 3.6mm/4mm, 6mm, 8mm, 12mm, and 16mm. It's essential to understand the differences between these focal lengths and their effects on your surveillance needs.


Larger focal lengths allow for long-range viewing with a narrower field of view.

Smaller focal lengths provide a wider field of view and shorter viewing distances.

Larger focal lengths offer increased detail clarity but limited field of view.

Larger focal lengths are necessary for capturing facial details and human forms from a greater distance.

Choosing the Right Focal Length: When selecting a surveillance camera focal length, consider the following factors:


Monitoring Range: For smaller monitoring areas with a need for wide-angle coverage, such as home living rooms or small shops, consider cameras with smaller focal lengths, like 3.6mm or 4mm. These provide a wide field of view (75°-90°) and cover spaces of 40²-80² with monitoring distances of over 5 meters.



Larger monitoring areas, such as spaces larger than 10m x 10m, require cameras with larger focal lengths. However, keep in mind that larger focal lengths reduce the monitoring angle. To ensure comprehensive coverage, consider using pan-tilt-zoom (PTZ) cameras or installing multiple cameras.



Long-distance monitoring: In cases where monitoring is required at a significant distance, such as a parking lot 30 meters away, choose cameras with larger focal lengths, such as 12mm or above.


Considerations for Specific Scenarios: To simplify the selection process, consider the following recommendations for different surveillance scenarios:

For confined spaces like garages or storage rooms, we recommend using cameras with a 2.8mm focal length for monitoring distances within 3 meters.

In indoor home or small shop environments, a 4mm focal length is suitable for monitoring distances of 3-5 meters.

For outdoor scenarios like home gardens, balconies, or entrances, a 6mm focal length is ideal for monitoring distances of 5-10 meters.

In outdoor areas like roads or alleys, an 8mm focal length is recommended for monitoring distances of 10-20 meters.

For specific long-distance fixed monitoring locations, a 12mm focal length is suitable, with monitoring distances ranging from 20-30 meters.

Conclusion: Choosing the right focal length for surveillance cameras is crucial for optimizing monitoring capabilities and achieving desired results. At OOSSXX Surveillance, we offer a wide range of security camera systems, including PoE 4K IP cameras and wired CCTV camera security systems, to suit various requirements. Whether you need wired security camera systems for outdoor surveillance or high-definition IP cameras for enhanced security, we provide reliable solutions tailored to your needs. Visit our website to explore our extensive range of products and find the perfect surveillance solution for your property.

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