Features of Trail Camera

 Just like other traditional digital cameras, there is now a lot of tracker cameras (camera traps) brands, models, specifications and prices, making it difficult to choose the one that is best for you. This guide to common tracking camera features has been written by experienced camera catcher Dr Stephen Ellwood of Wildlife Savvy Ltd to help you understand what is what. And while Stephen acknowledges that there are plenty of alternative sources of information that can help or bother you, he keeps things simple while also explaining that some jargon - bold italics - can be useful in web searches.

Track how the camera works

The basic description of how the tracking camera works provides a useful content to help you understand its various functions. Trail cameras are designed to be in a state of almost complete electronic sleep, like a TV on standby. The fully awake bits are motion sensors. In most tracking cameras, this is a passive infrared (PIR) detector, essentially the same detector found in a burglar alarm. When PIR detects movement, it "wakes up" the rest of the camera and triggers a quick series of events: it detects light levels and turns on the flash accordingly; Get into focus; Shutter speed determination; Image sensor takes one or more photos or videos; Pictures/videos are stored on an SD card (secure digital); The camera goes back to sleep. How much the camera can see (field of view) and what it can shoot depends largely on the lens combination, the type of image sensor that receives light from the lens, the level of illumination (sunlight or flash), and flip-flop - time (the time between motion detection and taking the picture). Importantly, most off-road cameras today will use infrared (IR) flash to take color images/videos during the day and black and white images at night - as opposed to the white flash of traditional cameras. The parameters required to control the camera and the parameters mentioned in the following functions are pre-programmed by the user through the screen and user interface of the camera itself and can be changed as required. Some cameras even have a built-in screen for viewing images.

The ability to detect animals

While some tracking cameras can be plugged into an external motion detection device, most use a PIR. PIR detection tracks average changes in the thermal landscape in front of the camera, rather than specific heat sources as the thermal imager does. These temperature changes occur whenever any object moves at a temperature different from its background. So PIR is just as sensitive to cold objects moving in front of a warm background as it is to more common warm objects (animals moving in front of a cooler background) -- they're all the same. Similarly, if they exhibit the same temperature changes relative to the background, large animals away from the camera are likely to be as easily detected as small animals close to it. If a very large animal is very close to the PIR but does not move, then it will not be detected. What follows is that the faster the motion, and therefore the greater the rate of temperature change, the more likely the PIR is to trigger the camera. The sensitivity of PIR to detect these subtle temperature changes depends on the make and model of tracking camera used, and only testing can determine this. Fortunately, independent tests are easy to find on the web. Some tracking cameras use up to three PIRS, pointing in different directions, designed to predict the animal's field of view as it enters the camera. Here, the risks of taking pictures without animals must be weighed against the expected value, and usually a high-quality PIR is more than enough.

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