The best shutter opening will depend on what you are viewing. If the frame rate of the camera is 30 fps, then the maximum shutter period is 1/30th of a second. The shutter time is also related to the frame rate. Shutter speed (Frame Rate): The longer the shutter is opened, the more light falls on the sensor, but a long shutter period can also cause motion blurring. This means that at night, especially when you are close to the camera, the picture may not be clear. When the iris is closed, the depth of field is very long, but when the iris is opened, the depth of field is very short. The depth of field is the distance between the nearest and closest distance where objects are still in focus. When you open the iris, you can get the most light on the sensor, but unfortunately, this also reduces the depth of field. In most cameras the iris setting is automatic, but in some IP cameras, you can make some fine adjustments. When there is a lot of light the iris opening is very small, and when there is very little light, the iris opens up as much as it can. Iris: The iris controls the amount of light that hits the sensor. Here are some guidelines for adjusting the camera settings, but please remember you may have to experiment to get the right settings for a specific situation. The processor removes noise artifacts that appear when the amplifiers are struggling to amplify the video signal. Some new cameras, such as the Hanwha X-Series, include special noise reduction technology. For example, the Hikvision DS-2C4526FWD-IZH IP dome camera has an amazing 0.0027 low light sensitivity. Some of the new 2-Megapixel cameras have better low light sensitivity than the higher resolution cameras. It includes an IR illuminator and a motorized zoom lens. This 12-Megapixel camera specifies the low light sensitivity at 0.3lux F1.6 in color. You can also consider the Hanwha PNO-9080R 4K bullet camera. For example, the Hikvision 8-Megapixel dome camera, model DS-2CD4585F-IZH, specifies the low light performance at 0.014 lux (ƒ/1.4, AGC on). There are a number of more reasonably priced 4K IP cameras that are priced at under $1000. It’s an expensive camera (around $7500), but at night it can see things no other 4K camera can see. This amazing camera not only has very high, 4K resolution, it also has a minimum low light sensitivity of 0.007Lux (in color). The highest resolution and lowest light level camera we have tested is the Sony SNC-VB770. In general, low light performance depends on the size of the sensor and the resolution. Some of the latest cameras can see with less light. The better low-light cameras can see by the light of the full moon. For example, a camera that has a variable focal length of 2.8 mm to 12 mm will have a variable light transmission of f1.4 (wide) to f3.6 (tele). As the lens is zoomed (magnified) less light is passed through the lens. When selecting a variable lens, the highest light transmission light (the lowest f-number) is when the lens is set to its widest angle. The lower the f-number the more light the lens can pass. For example, a camera used to see people walking close to the camera (within 50 ft.) will be different than a camera used to view a parking lot.Ĭamera Lens: The lens is an important factor in low light operation. One thing to note is that the camera and the settings can be different depending on your specific application. In some applications, it can also help to select a camera with a built-in IR illuminator. The camera should also have a good signal to noise ratio and include a day/night IR filter. You should also select a camera that includes adjustments for amplifier gain, iris control, frame rate, and shutter speed. The low light sensitivity of the camera is a significant specification, but it’s not the only thing to consider. Selecting the IP Camera for Low Light Conditions But, what is the best IP camera for low light operation, and what are the correct settings? This article provides guidelines for selecting the right camera and adjusting the image settings. When it’s dark, there can be motion smearing and amplifier noise that degrades the image.Īll IP cameras handle low light by opening the lens iris, increasing amplifier gain, increasing shutter time, and switching to day/night mode. When selecting cameras for your IP camera system, one of the most challenging situations is when you have very little light. White paper: Video Management Software for IP Cameras.Smartphone Door Access Using Bluetooth Reader.Integration of IP Cameras and Door Access Control and more.Analytic and Specialized Camera Systems.
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