First see if your camera can see infra red. To do this, switch it on and point a TV remote at the lens, press and hold one of the remote buttons. You won't be able to see the light, but if your camera can then your half way there. Next, sort out your old photos, or more exactly the negatives, remember those, before all this electrickery gadgetry digital malarky? Now, what you're looking for is the bits at the end of the negatives, the spare bit that has no image on it but has been exposed and developed. It should appear dark reddy brown. Transparent bits are no good.
You need enough of this stuff to cover the lens, and you need three to four layers. Clip them together or tape them at the edges and then attach them to the lens in such a way that no light can get in around the edges (you'll have to figure this bit out by yourself).
I used a camcorder for these photos, which are better suited for this because they are biased towards being able to film in low light etc, while digital stills cameras specialise in good depth of colour and so often filter infra red out in order to maintain a correct colour balance. To combat this, either take your camera apart and remove the cyan correction filter (only do this if you have an old camera that you don't mind ruining, as inevitably you are left with a matchbox full of spare bits that no longer want to go back....all modern cameras are assembled by minute elves, this is the only way to make them so small), or set to 'low light' / 'night shot' etc.
Best results are achieved on a bright sunny day. It won't work when it's dull, cos there's barely enough light for the camera to operate with. You may need to manually adjust the focus as well.
If anyone has any success with this I would love to see you post the results.
Many insects and particularly bees can detect infra red, this is why they are sometimes attracted to what at first glance seems like a rather plain flower, but under infra red often display patterns you wouldn't know were there.
Open water shows up inky black. Use a polarising filter (if your camera can cope with even less light!) and you will be able to cut the reflection and film fish which shine brightly!
Some car windows have special layers on them to block sunlight and they show up opaque black.
Finally, a warning... Humans reflect infra red and so show up light. Some types of clothes don't reflect infra red so appear invisible. In some circumstances your camera will work like X-ray specs!!! Might seem to good to be true, but BEWARE..When Great Aunt Flo comes to visit wearing her new light summer dress you could see a sight that no mere mortal was meant to see........my eyes!!!