![]() Pointing two IR cameras at each other will likewise do the same.ZDNet's recommendations are based on many hours of testing, research, and comparison shopping. Pointing an infrared camera at a window, for example, will bounce right back to the camera and produce an overwhelming amount of useless white light. ![]() We have tried to simulate both situations in the images below. An infrared camera will often appear brighter inside than outside in an open space because there are more surfaces to bounce off of. Anything else I should know about night vision? This probably started as totally legitimate, because in the 1970s and 1980s you had to pay a bit more for "high-end" color cameras rather than black and white cameras, but today, this is mostly just shady marketing that implies the camera can do something it cannot. They do not mean that they are colorizing the infrared spectrum at night. Some really unethical sellers like to say that their cameras are "color infrared." What they mean is that instead of being black and white during the day, they are color during the day. Infrared light is one of the most reflective wavelengths of light and will bounce off of flat surfaces. Fog, humidity, smoke, and scene reflectance can radically change the IR distance. IR measurement is a bit of a subjective thing because IR can vary wildly in different conditions. What can change an IR distance measurement? We put the camera outside of our warehouse in NC and test it on a mostly clear day since we are in a pretty humid place). We estimate the maximum distance in an open outdoor space during normal humidity levels for the United States. This is because there is no industry-wide standard on how to measure the distance. Often the same camera parts, by two different manufacturers, will be stated that they have different distances. IR distance measurements do not have an industry-wide formula. How does the Industry measure IR distance? Single bulbs pose a bit more risk of a catastrophic failure because you only have one bulb that can potentially burn out. Just like regular light bulbs, you can buy low-light IR bulbs and install a lot of them or a single high-powered bulb. What about distance and the brightness of bulbs? Do the number of bulbs matter? Other than greater distance, this is the only meaningful change in IR in the last fifteen years. This allows the image to not get "washed out" by over-exposing the subject. Smart IR allows the camera to reduce or increase the level of infrared light it projects based upon the subject's distance. We've heard some pretty ludicrous claims about how _ model's night vision is so much better. ![]() No matter who you go with, you really are going to get very similar equipment when it comes to night vision, save brighter bulbs, and Smart IR. Other than two changes, Smart IR and brighter IR light bulbs, there's been very little change in the surveillance industry in the last 10-15 years. Mostly the lack of difference in night vision is due to the US military, which regulates what can be released to consumers. ![]() There's very little difference in night vision among manufacturers of surveillance equipment.
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