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couple of trees-ir
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crooked tree-ir
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dual tree-ir
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four pidgeons-ir
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gnarled tree-ir
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half a dozen pidgeons-ir
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lots of branches-ir
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one tree-ir
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the lions-ir
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trees in a line-ir
In infrared photography, the film or image sensor used is sensitive to infrared light. The part of the spectrum used is referred to as near-infrared to distinguish it from far-infrared, which is the domain of thermal imaging. Wavelengths used for photography range from about 700 nm to about 900 nm.