Infrared filter 850 wavelength infrared light introduces that sunlight contains rich and varied rays, and of course it also contains infrared light. When sunlight is reflected on an object and reflected to our eyes, we actually receive infrared light, but our optic nerve does not respond to it. All-wavelength infrared filter is suitable for ambient infrared filter: according to the specifications of lens wavelength, it blocks the filtered visible light and allows infrared light to pass through. It can be used to separate the infrared effect in the mixed light environment of visible light and infrared light. 720 nm is mainly aimed at digital cameras without infrared function (or when the infrared camera is in non-infrared shooting mode). Because 720 passes more visible light, infrared effect and visible light color coexist. Through some shooting skills and post-processing, we can get color pictures with semi-infrared effect, which is another miracle compared with pure infrared pictures taken by high-wavelength filters! 760 nm 1\ Suitable for models with infrared function (DV/DC): outdoor and indoor venues on cloudy days. 2\ For cameras without infrared function, DC can get a purer infrared landscape than 720. 850 nm infrared model is suitable for 850 to pass more infrared rays than 950, and is suitable for the environment with weak infrared rays. 950 nm infrared model is suitable for 950 to completely filter visible light. The light in summer is generally stronger than that in other three seasons, and the infrared ray is sufficient. Using 950 will not lead to overexposure, and you will get excellent pure infrared effect. If you focus on outdoor shooting, it will be your veritable summer favorite. 950 is suitable for typical sunny outdoor in summer: the principle of infrared photography in beaches, parking lots and scenic spots. Ordinary film cameras can also take infrared photography, but they must be equipped with special infrared sensitive films and infrared filters. The CCD/CMOS photosensitive elements used in digital cameras/video cameras (hereinafter referred to as cameras) can sense infrared rays. In order to ensure that normal shooting will not lead to color shift due to infrared interference, camera manufacturers are equipped with ICF in front of CCD to block infrared rays and pass visible light. Contrary to ICF, the function of infrared filter is to block visible light and let infrared light pass through. The camera with night shooting function removes this ICF by mechanical device, so that the CCD can fully receive infrared rays! The function of infrared filter is to filter and block visible light while allowing infrared light to pass through. Through it, the infrared effect is separated in the environment where visible light and infrared light coexist. There are a lot of infrared rays in sunlight, but the coexistence of visible light will interfere with infrared shooting and overexpose the picture, so it is necessary to add infrared filters to filter visible light to obtain pure infrared effect. There is no need to use infrared filters at night and in other environments where visible light is dim. If infrared photography is needed at this time, high-power infrared lamps must be configured for lighting. Suitable models for infrared photography: According to different applications of infrared characteristics, shooting can be divided into two major directions. ◆ Infrared scenery photography ◆ The necessary conditions for infrared perspective to apply infrared photography are: 1, infrared sensitive imaging equipment 2, infrared filter 3, sufficient infrared light 4, shooting opportunities. When it comes to infrared photography, many people will associate it with the one-sided propaganda of "perspective" cameras in many media. In fact, whether it is digital DV or DC, what really has magical perspective effect is infrared. First, infrared rays pass through the first layer of material and reflect on the second layer of material below, and then pass through the first layer of material again. At this time, the first layer of material is translucent visually, which is the so-called perspective phenomenon. Then, use related equipment to shoot the existing effects. The wavelength of infrared ray is higher than that of visible light, and it can easily penetrate some thinner materials that visible light cannot penetrate, such as chemical fiber fabric, plastic, brown glass, paint, dust, smoke and so on. These characteristics are widely used in military, scientific research, ecology, fire protection, medicine, public safety and many other fields.