Nikon camera changed to infrared photography

With 770nm as the boundary, some visible light (including IR, of course) is included below 380nm, and the more visible light goes down; The purer the heat is black and white, the higher it goes, the longer it needs to be exposed. It is almost impossible to shoot by hand, even if it is below 770, it is very difficult, because infrared rays only account for more than 40% of sunlight, and those parts need to be filtered out, and the exposure characteristics are different from those of visible light. There is also that the optical path characteristics of IR and visible light are different, and the focus is soft.

You can use infrared filters combined with visible light to get your favorite strong colors. For new users, you can play 720nm or lower first, and then slowly go up and down. 950 is only suitable for strong sunny days, cloudy days > foggy days > indoor, not an IR filter can handle all climates. However, the higher you go, the softer your image becomes. 1000nm above, basically used for scientific research.

You can also do white balance pre-shooting color on the subject or background that needs to be colored, then shoot IR into black and white, and switch the color channel to black and white film, or you can have strong color, which is stronger than the above method without distortion. Many films with strong contrast and contrast are almost all post-processed.

It should be noted that infrared photography is easy to produce hot spots or white spots (if it is overexposed by visible light). It is best to choose a fixed-focus lens with the simplest structure to reduce the reflection in the mirror (the reflection characteristics of infrared and visible light are different, and the aperture blade can even reflect light). In fact, black and white headgear is most suitable for infrared photography (headgear is usually in pairs). It is easier to avoid hot spots when the aperture is fully open than when the aperture is contracted. In addition, you need to be familiar with the specific heat characteristics of things (absorption and divergence of brick and wood, active divergence and divergence of vegetation, etc.). ) to select filters and determine exposure parameters according to the scene.