In order to understand what can be shot on a certain photographic emulsion with a certain light source and with a certain filter, you need to “turn on” (tick) the necessary elements. By default, only the visible spectrum is enabled. It graphically presents (conditionally, but close to real values): the spectrum of colors visible to the eye, the spectra of light sources, the spectral sensitivity of the eye and photographic emulsions, the spectral characteristics of filters and glass.

To illustrate the different aspects of visible and 'invisible' photography, consider the following flash movie. Typically, IR films require special storage and operation conditions, and the camera body should not be “transparent” for the rays that illuminate the IR film. For shooting in the IR range, special photographic materials are needed. But in a photo lab, when printing, you can use red and green filters and control the development process visually. Non-sensitized photosensitive materials are sensitive in the range of 350-450 nm, so in the early days of photography, nothing but 'blue' and UV could be captured. The main limitation is still photographic materials. The atmosphere (ozone, steam, dust) strongly absorbs and scatters the range of 10-300 nm, and glass also cuts off longer waves, so for photography (without additional light sources and special lenses) you can actually use only the near UV zone - 300-400 nm. The UV zone conditionally extends up to 1 nm, and the IR zone up to 1 mm. Scattered light, haze creates the impression of depth of space, but if you need the clarity of a black and white shot for distant objects, put an orange filter on the camera. And in the mountains and by the sea you can’t do without a UV filter, otherwise what is invisible to the eye can significantly spoil the pictures (there is no haze that absorbs ultraviolet near the sea and in the mountains). Light sources shine in both IR and UV ranges. Radars see in the invisible zone of the radio range (even longer than IR), and mirror-plates for radio waves spoil architectural views everywhere. And the mechanisms and principles of optics continue to operate (there are lenses and mirrors). Outside the visible zone of the spectrum, the radiation does not end. In the IR range, we do not see, because otherwise we would blind ourselves with our own heat. However, the retina can perceive the 'residues' of ultraviolet in the form of a fluorescent bluish glow of the lens (re-emission in the longer wavelength zone of the spectrum). But the lens and the vitreous body protect it from relatively 'hard' radiation.

The retina is, in fact, sensitive to the shorter wavelength zone of the spectrum. Everything that is behind them, the eye does not distinguish. The boundaries of the visible (eye) range are considered to be ultraviolet UV (380 nm) and infrared IR (760 nm).

Invisible oovoo detector