Starlight Function of Surveillance Cameras-Knowledge Encyclopedia-Shenzhen Kai Mo Rui Electronic Technology Co. LTD

Starlight Function of Surveillance Cameras

Source：Shenzhen Kai Mo Rui Electronic Technology Co. LTD2026-07-30

A great many starlight-grade and ultra-low-light surveillance cameras are available on the market. This article elaborates on the core working principle and practical applications of the starlight function deployed on security cameras.

I. Definition & Hardware Foundation of Starlight Function

Starlight function refers to the capability of a camera to deliver color video footage under ultra-low illumination (below 0.01 Lux). This performance is realized through the combination of large-aperture lenses (F1.0~F1.2) and high-sensitivity starlight CMOS image sensors.

Core hardware components are listed below:

Large-aperture Lens: Maximizes light intake. For example, an F1.0 lens captures 2.56 times more light than a conventional F1.6 lens.
Low-light Image Sensor: Boosts faint light acquisition by expanding the photosensitive area of each pixel (e.g., large 1/1.8-inch sensor target surface) or extending electronic shutter exposure time.

II. Technical Characteristics of Starlight Function

1. Full-color Night Vision with Automatic Mode Switching

Under dim ambient light (moonlight, faint street lamp lighting etc.), starlight cameras sustain color imagery featuring finer details and lower image noise.

Once ambient brightness drops below the threshold (generally under 0.001 Lux), the camera automatically switches to infrared mode, and the screen turns black-and-white.

2. Advantages Over Traditional Infrared Cameras

No reliance on infrared supplementary lighting: Conventional IR cameras depend on built-in IR LEDs, which suffer from limited illumination range and light pollution issues. Starlight cameras can form images purely via ambient faint light.
Extended Wide Dynamic Range (WDR): Supporting up to 120dB WDR technology, the camera retains abundant details in backlit shooting scenarios.

III. Applicable Scenarios & Limitations

Suitable Application Scenarios

Low-light surveillance sites: Residential compounds, warehouses, underground parking lots and other areas requiring covert monitoring.
Zones with strict anti-light-pollution requirements: Ecological reserves and protected areas where auxiliary fill lights are prohibited.

Limitations

Higher procurement cost: Large-format sensors and ultra-large-aperture lenses incur substantially higher hardware costs compared to ordinary surveillance cameras.
Restricted scene adaptability: Starlight function still requires infrared fill light under total darkness. In addition, ultra-large apertures lead to shallow depth of field, making it impossible to keep both near and distant objects sharply focused simultaneously.

IV. Comparison with Other Night Vision Technologies

表格

Technology Type	Core Advantages	Applicable Scenarios
Starlight Function	Color imaging under faint ambient light; no active supplementary lighting required	Indoor & outdoor venues with subtle residual light
Full-Color Night Vision	Continuous color footage even in pitch-black surroundings	Roads, construction sites and other areas equipped with white light fill lamps
Infrared Night Vision	Low cost, long night vision distance (max. 50m); monochrome output	Totally dark environments where color details are unnecessary

Summary

By hardware optimization, starlight function breaks through the bottlenecks of traditional night vision technologies and achieves round-the-clock color monitoring in low-light environments. Users need to balance procurement costs and actual site lighting conditions when selecting cameras equipped with this technology.

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