Digital cameras allow us easy learning by providing immediate feedback .

Unfortunately , not all digicams are equal on the infra red scene . 

Some do better than others : the Canon G1 and the Nikon CP950 are both IR-capable .

To test your own camera for IR sensitivity , point any TV or other IR remote into the lens . 

If you see a bright beam , your camera is a go for near infra red photography .

The situation is more difficult with SLR's . As no LCD ( D30 ) can be used to compose and to preview the picture , 

it's mandatory to use a tripod , framing the pic , setting the focus and ... put the IR filter on the lens before

to press the shutter button . 

At ISO100 , in bright sun , my settings are : f11 and 3 seconds .  

But no such photography will be possible without a so-called IR filter .

Hoya R72 Filter ( equivalent to Wratten 89b )

Very affordable , it lets only a fraction of visible light through .

B+W 093 Filter ( equivalent to Wratten 87c ) from Schneider Optics lets only non visible light through and is pricey.... 

The Tiffen 87 is even more expensive ....

Héliopan RG715 ( iso Wratten 88A ) is very affordable and can be found at most important retailers .

These filters are available in 37mm and up .

None of my pix had an exposure time shorter than 1/10th of a second .

Since my G1 didn't accept 87C filters , I used a Heliopan RG715 ( 88A ) which worked very well too . See here

The D30 got a Hoya R72 to make its IR recordings . See here