By removing the IR filter from a digital camera and adding a ‘superblue’ filter, the NDVI can be calculated with just a little bit of image processing. The folks behind this have put up a ...

[Makers Mashup] shows in a video how to use an adjustable IR filter to cut out all the light bleed to get a sharp image to make focusing simpler. The filter he shows adjusts from 530nm to 750nm ...

Ideal for Wide Angle Lenses. Infrared 950nm optical glass Screw-in filter Metal, double threaded frame to allow additional filters or hoods. Superfine matte black frame.

a huge variety of physical filters exist, from IR filters that block infrared light to mist filters, which create soft, dreamy photos. But by far the most popular, and indeed useful, filters are ...

But infrared (IR) light is beyond the end of the visible spectrum, so we cannot see it with our eyes. The filter that we used in this activity blocked almost all visible light, allowing us to see the ...