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Introduction: Choosing the right focal length for your surveillance camera is important for optimal performance and image quality. At OOSSXX Surveillance, we understand the importance of choosing the ideal focal length for your specific security needs. This article provides valuable information on focal length selection and its impact on surveillance camera performance. Whether you are looking for a high resolution 4K IP camera system or a reliable wired security camera system,

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 a security camera, focal length also refers to the distance between the lens and the CCD/CMOS image sensor. Focal length determines the image size, field of view, and depth of field of the captured image.

The effect of different focal lengths: Today's leading security cameras, especially our advanced IP cameras, offer a variety of focal lengths such as 2.8mm, 3.6mm/4mm, 6mm, 8mm, 12mm, 16mm, etc. It is important to understand the differences between these focal lengths and how they affect your surveillance needs.

A larger focal length allows you to see farther into the distance with a smaller field of view.

A smaller focal length provides a wider field of view and shorter viewing distance.

A larger focal length provides clearer detail but limits the field of view.

A larger focal length is needed to capture facial details and human shape from a distance.

Choose the right focal length: When choosing the focal length of your security camera, consider the following factors:

Surveillance Range: For smaller surveillance areas that require a large coverage area, such as a home living room or a small shop, consider cameras with smaller focal lengths like 3.6mm or 4mm. These cameras offer a wide viewing range (75°-90°), with a surveillance distance of 5 meters or more, covering a space of 40²-80².

For larger surveillance areas (over 10m x 10m), a camera with a larger focal length is required. However, keep in mind that a larger focal length reduces the surveillance angle. To ensure comprehensive coverage, consider using a pan-tilt-zoom (PTZ) camera or installing multiple cameras.

Long-distance surveillance: If you need surveillance over a large distance, such as a parking lot, choose a camera with a larger focal length of 12mm or more.

Considerations for specific scenarios: To simplify your selection process, consider our recommendations for the following monitoring scenarios:

In small spaces such as garages and warehouses, we recommend using a camera with a 2.8mm focal length for monitoring distances of up to 3 meters.

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

In outdoor scenarios such as home gardens, balconies or entrances, the 6mm focal length is ideal for a monitoring distance of 5-10 meters.

For outdoor areas such as roads and alleys, 8mm focal length is recommended for a surveillance distance of 10-20 meters.

For certain long-distance fixed monitoring locations, the focal length of 12mm is suitable, and the monitoring distance is 20-30 meters.

Conclusion: Choosing the right focal length for your surveillance camera is important to optimize your surveillance capabilities and get the desired results. OOSSXX Surveillance offers a wide range of security camera systems for different requirements, including PoE 4K IP cameras and wired CCTV camera security systems. Whether you need a wired security camera system for outdoor surveillance or enhanced security with high definition IP cameras, we have a reliable solution for your needs. Visit our website to explore our wide range of products and find the best surveillance solution for your property.