Most
digital cameras can often see into the infrared part of the spectrum.
It depends entirely on the design of the imager, the materials
used and the qualities of layers of filter material and glass
that overlay the sensors.
With
most cameras, if they do respond to infrared light, their sensitivity
to this part of the spectrum is very poor in relation to their
response to visible red, green and blue. Their sensitivity to
IR is so low that it usually requires bright sunlight or long
exposures to get enough to form an image.
Right:
An avenue of pleached
lime
trees, Mottisfont Hampshire