One of the easiest and coolest camera hacks we've seen lately is possible with the just-released Sigma SD14. And best of all, it doesn't involve specialized tools, major camera dissection, or any potential warranty voiding actions.
By simply removing the infrared (IR) cutoff filter from this digital SLR, the camera gains the ability to capture IR plus visible spectrum images. And with the addition of an IR filter, you can go straight to IR-only capture.
Why would anyone want to do this? Foliage and water can have dramatic shifts when captured in infrared, and make for impressive IR monochromes. As seen by the photos in this gallery, IR imaging can bring out cloud details in an overcast sky or make a building in the background sharp despite atmospheric haze. IR imaging brings to light a world that's hidden just beyond the edges of our vision. Read the whole article here