![]() ![]() Which wavelength is best for spotting wildlife? One thing to be aware of is that there is still a small red glow from 940nm torches although it is significantly reduced compared to an 850nm torch. Sometimes when you use 940nm the “colour” of the beam on a night vision unit is slightly more violet, as in the images on this article, whereas it is typically more grey when using an 850nm torch. In theory the image quality and range is a little bit lower, although you may not notice this. Our customers often use 940nm torches as a “stealth” solution, making it perfect for airsoft and security applications but also for tracking cautious wildlife. If you are watching Badgers burrowing in your backyard that might not be a problem, but the red glow from an 850nm torch could give away your location. ![]() That means your IR flashlight could have a slight red glow. The 850nm range is very close to being visible light, the human eye can very slightly perceive this frequency. The one problem with 850nm light sources is that they give off a visible red glow. ![]() 850 gives better pictures because IR cameras are most sensitive to radiation in this wavelength. We thought we’d write a blog post explaining the differences and advantages of each frequency.Ĩ50nm torches will give the best picture, they will have a slightly longer usable range and they are less likely to create blurry images than 940nm torches. Customers often ask Nightfox which wavelength of infrared torch is best. ![]()
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