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The trick of infrared photography

By Jakob Jelling

It is a fact that digital cameras have revolutionized the world of photography. And infrared digital photography is just one more feather in the hat of this fantastic technologically advanced device. In order to understand the beauties of infrared digital photography it is important to get the details of the technology. This discussion is an attempt to explore the incipient stages of information regarding the infrared digital photography in order to appreciate the fantastic application this infrared digital photography has!

To get in depth knowledge it is important to understand the infrared light itself. The infrared spectrum of light is the light in the spectrum just beyond visible red light starting at a wavelength of around 770 nm. A really appreciative way to visualize this knowledge regarding infrared light is to think of common objects such as a stove may be. When turned on, the stove coil begins to radiate infrared light just before the coils start to glow red. This is thus just a portion a spectrum and this has wide applications in infrared digital photography. Considering good and common digital cameras typical shutter speeds are 1/4-1/15 sec, outdoors in the sun. For example the Nikon Coolpix 950 works somewhat better metering shutter speeds of 1/15-1/45 sec outdoors in the sun.

Some other good practices are to use smaller apertures so depth-of-field is increased. And also setting the focus at infinity for landscape shots in case of infrared digital photography has in digital cameras.

In order to understand the infrared digital photography using digital cameras it must be noted that thermal radiation both far infrared and near infrared radiation are not the same. Recording them requires special imaging equipment that is not commonplace in the consumer market. Any digital camera that doesn't have a filter that blocks infrared light, most popularly known as hot mirror filters, installed within them can be used to record infrared light. Most consumer digital cameras don't have hot mirror filters installed by default. Thus infrared digital photography is possible in these digital cameras. In order to find whether a particular digital camera can be used to record near infrared light they can be tested to see if they are able to see beams emitted from a common infrared remote control. These beams seem to be fairly bright and are easily seen in a digital camera's LCD preview area. If the LCD is absent on the camera a person can try to capture the beam by taking a picture of the remote while depressing a button on it. This is a good method for verification.

The above discussion has focused upon a lot of issues regarding the infrared digital photography has in digital cameras, considering both construction as well as applications. It can be expected here that they would enable to impart significant knowledge to the users of the infrared digital photographers who pioneer in digital cameras in creating art!

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