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I was 7 years and was surprised when someone told me there are more than 7 colors. Later I realized the human eye has a limited color perception and it can only see those seven colors of the rainbow. Infrared is a color spectrum which falls outside the perception of the human eye. So you can’t see infrared. But why try to photograph infrared when you can’t see it? Well, the cameras can see it and they can make an image of it which shows up to the human eye in the picture. Just like any other color in the spectrum, infrared is a single color. So the image you get is formed by the variation in the infrared levels in the scene. The picture that comes out it totally black and white but – surprise, it’s an image of something we have never seen. Without going into the physics let me mention that infrared is emitted by all warm objects and reflected by all objects which are opaque to infrared.
In infrared photography, the image sensor or the filter has to be sensitive to infrared light which means we use the wavelengths range from about 700 nm to about 900 nm. A DSLR sensor or even film SLRs allow you the control and sensitivity required to shoot infrared. But there’s something that has to be taken care of – we need to ensure that the other colors do not reach the sensor else the image will be like any other image. Infrared filters are available online and you can use the Hoya Infrared Filter
Infrared photography requires extended exposures or shutter-speed to absorb whatever little of the infrared light is available. Thus the use of a tripod is mandatory. As a workaround you can place the camera of a stable surface, compose the scene and shoot. Shoot stationary subjects and you shall be fine.
Infrared images never fail to impress so add some to your collection and share them here. Just a Flickr link will do.
Photo by ~jjjohn~
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{ 1 comment… read it below or add one }
As i was a internet explorer user, i want tools like vbs.
VBScript can opretate InternetExplorer as wsh(WindowsScriptingHost)
for example
=========
dim wbrowser as object
Set wBrowser = CreateObject(”InternetExplorer.Application”)
=========
I wish if there were a tool which can operate “FireFox” as wsh can operate InternetExplorer.
I would appreciate if you kindly invent the tool for all FireFox users .