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Looking for the right lens for your security camera? The 4mm fixed lens might be the unsung hero you need. Not too wide, not too narrow—it offers the perfect balance for monitoring stores, offices, entrances, and more. In this guide, we break down how it works, where it shines, its few quirks (like distortion), and why it’s a go-to choice for real-world surveillance—no engineering degree required.

In order to effectively carry out heatstroke prevention and cooling work during the high temperature season, enhance the awareness of high temperature labor protection among employees, effectively prevent the occurrence of high temperature heatstroke and various accidents, and safeguard the labor safety and health rights and interests of employees.

In the shadowed corners of cities—alleyways, underground garages, and remote rural areas—criminals often exploit the cover of night to carry out illegal activities. Statistics show that nearly 70% of crimes occur after dark. Without effective nighttime monitoring, roads, warehouses, and open fields become vulnerable zones that threaten both urban and community safety. To meet this urgent need, security camera lens technology has made remarkable strides in low-light performance. Two leading solutions have emerged: Black Light F1.0 large-aperture imaging and infrared illumination. These innovations do far more than just let cameras “see” in the dark—they enable systems to see clearly, recognize details, and even understand what they’re seeing, thanks to deep integration with artificial intelligence.

The special effect of polarizer is to effectively exclude and filter the scattered light in the beam. The light can be put into the eye visual image in the right light axis, so that the visual field is clear and natural. Like the principle of blinds, light is adjusted to the same direction of light into the room, nature makes the scene look soft and not harsh.