No-glow infrared cameras: 940 nm and 850 nm compared

The invisible infrared camera is based on so-called "no glow" LEDs that illuminate the night scene without producing any perceptible red halo. This is the main argument of the trail cameras thought to remain discreet on a crowded terrain. But behind this promise lies a technical choice between two lighting families: the 940 nanometre noglow and the 850 nanometre lowglow. Each affects the discretion, range and quality of night images. In this comparison, we explain these differences to help you choose the most suitable device among our trail camera.

Invisible infrared camera: the principle of no glow 940nm

An invisible infrared camera uses diodes that emit in a wavelength close to 940 nanometres, located outside of what the human eye can easily perceive. In concrete terms, when the device is activated at night, no red light appears at the front of the case, or in a very attenuated way depending on the models. This is called the "no glow" or invisible flash. This reduces the risk of attracting attention, whether it be suspicious animals or unwanted passages. In return, this type of lighting usually requires more energy to get a properly exposed scene, which can affect the battery life depending on the models and the conditions of use. The night rendering often remains in black and white, since the image is built from an infrared signal and not from a visible light. To compare enclosures with this technology, browse the selection of trail camera and observe the data sheets of each device.

Invisible infrared camera or low glow 850nm: what differences

Facing the invisible infrared camera, the 850 nanometre low-glow takes a different approach. Its LEDs produce a light red glow that is visible when the flash is triggered, but does not light up frankly like a lamp. This lower wavelength has an interest: it often returns brighter and more contrasting night shots, as the sensor receives more signal. The compromise therefore takes place between maximum discretion and visual rendering. A trail camera in 850 nm can be suitable where absolute discretion is not the priority, while a 940 nm model is required on sensitive areas. Note that these wavelengths are not strict squares: some 850 nm diodes remain light to the eye, and the feeling also depends on the angle of view and distance. Depending on your usage, you can also complete your installation with accessories such as memory cards or suitable mounting supports.

Invisible infrared camera: how to choose according to your field

The right arbitration depends mainly on the context of use and the constraints specific to your site. Here are the criteria to consider before setting your choice.

Invisible infrared camera: focus on discretion

If the priority is to remain totally unnoticed, the invisible infrared camera in 940 nm remains the reference. On a crossing layon, near a trail or in an area where other people are travelling, the absence of a red glow prevents the case from being seen from the corner of the eye. This discretion also benefits the observation of fierce species, which can react to even a weak light source. However, keep in mind that no technology guarantees perfect invisibility: a poorly concealed device remains detectable by day. So think of treating the camouflage of the housing and its orientation. To identify areas of watching from a hide or complete your approach, Binoculars can help locate the terrain before placing your trail camera.

Invisible infrared camera: arbitrating between range and night quality

The invisible infrared camera and the low glow are also not valid for the lighting range and rendering of the images. In general, the 850 nm offers lighting that is perceived to be more powerful, which can help on larger or more distant scenes, where the 940 nm requires more proximity or longer exposure. This difference is due to the sensitivity of the sensor, which generally reacts a little less at high wavelengths: with comparable LED power, the rendering in 940 nm can therefore seem darker on distant subjects. Night quality also depends on sensor, optics and sensitivity adjustment, not just LEDs. The number of diodes and their arrangement around the lens also play on the homogeneity of lighting. Before deciding, define the average distance to be covered and the level of discretion actually required. For an overview of an extended terrain, some prefer to complete their cameras with a drone. If you hesitate between two configurations, you can also write to us via the page contact.

Conclusion

Choosing an invisible infrared camera is about arbitrating between discretion and night image quality. The noglow 940 nm fades completely at night and is suitable for sensitive areas where the absence of prime gleam, while the lowglow 850 nm tends to offer brighter shots at the cost of a slight visible gleam. Neither of the two families is universally better: everything depends on your terrain, the distance to be covered and the level of discretion expected. Take the time to compare the data sheets and cross these criteria with your actual use. To take action and find the right model, explore all of our trail camera and select the device that meets your needs.

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