Infrared Photography
Many of us love infrared (IR) photography, myself included.
Here is one of my shots using a Photoshop post-processing channel swap (red/blue). The softness was also later applied. But note how greens appear white - that is the magic of IR! Check the second image below.
The easiest way is to get yourself a Sony DSC-717 along with a Hoya R72 filter and one or two ND (neutral density) filters. I found that it worked well with a +4 ND. Use the Night Shot mode and fire away 
The advantage using the Sony is that you do it hand-held!
Another way is to check the lens compatibilty chart below. Some lenses just do not play well with the R72s and yield a big, fat, ugly ‘hotspot’ in the center of your image. To use a standard digital SLR with one of the lenses below still means long exposures (up to and exceeding 30 seconds), so a tripod is essential!
R72 passes only infrared rays above 720nm.
RM90 passes only that above 900n.
Dedicated IR Cameras - It is now possible to have a standard digital camera converted to infrared. The IR blocking glass piece is switched out for an infrared piece and you can shoot handheld! I now have a Rebel XT which is dedicated for IR work. The continuing task is to keep up with the lenses that are good or bad for IR.
Lenses Rated Good for IR (infrared)
Canon EF-S 10-22mm f/3.5-4.5
Canon EF 17-40mm f/4 L
Canon EF-S 17-85 f/4-5.6 IS
Canon EF 24-70mm f/2.8 L
Canon EF 24-105mm f/4 L IS
Canon EF 28-135mm/3.5-5.6 IS
Canon EF 28mm f/2.8
Canon EF 50mm f/1.8 MKI
Canon EF 50mm f/1.8 MKII
Canon EF 70-200mm f/4 L
Canon EF 70-300 f/4-5.6 IS USM
Canon EF 75-300mm f/4-5.6 IS
Canon EF 135mm f/2 L
Canon EF 100-400mm f/4-5.6 L IS
Canon EF 100mm f/2.8 Macro
Canon TS-E 24mm f/3.5 L
Nikon 18-55 mm f/3.5-5.6 AF-S G ED DX
Nikon 18-70 mm f/3.5-4.5 AF-S G ED DX
Nikon 24-70 mm f/3.5-5.6 UC
Nikon 35-70 mm f/2.8 AF D
Nikon 35-70 mm f/3.3-4.5 AF (1986) (*)
Nikon 35-135 mm f/3.5-4.5 AF
Nikon 70-210 mm f/4.0-5.6 D
Nikon 20 mm f/2.8 D
Nikon 20 mm f/3.5 AI-S
Nikon 28 mm f/3.5 PC AI-S
Nikon 85 mm f/1.8 Pre-AI MF (*)
MTO 500mm f/8
Sigma 400mm f/5.6
Tamron 28-300mm XR
Lensbaby 50 mm f/2.8
Peleng 8 mm fisheye
Phoenix 100 mm f/3.5 macro
Sigma 105 mm f/2.8 EX DG macro (*)
Vivitar 24 mm f/2.8 MF (*)
May produce a hot spot
Sigma 10-20 mm f/4.0-5.6 EX DC HSM (*)
Sigma 70-200 mm f/2.8
Canon EF 85 mm f/1.8
Canon EF 200 mm f/2.8 L
Bad for IR (yields hotspots)
Canon EF 15mm f/2.8 fisheye
Canon EF 16-35mm f/2.8 L
Canon EF-S 18-55mm f/3.5-5.6
Canon EF 20mm f/2.8
Canon EF 20-35mm f/3.5-4.5 USM
Canon EF 24/2.8
Canon EF 24-85mm f/3.5-4.5
Canon EF 28-70mm f/2.8 L
Canon EF 28-105mm f/3.5-4.5
Canon EF 35mm f/2
Canon EF 35-80mm f/4-5.6
Canon EF 50mm f/1.4
Canon EF 50mm f/2.5 Macro
Canon EF 70-200mm f/2.8 L IS
Canon EF 70-300mm f/4.5-5.6 DO
Canon EF 85mm f/1.8
Nikon 12-24 mm f/4.0 G IF-ED AF-S DX
Nikon AF 50 mm f/1.8 D
Sigma 17-70mm f/2.8-4.5
Sigma 18-50 mm f/2.8 EX
Sigma 30 mm f/1.4
Tamron 17-50 mm f/2.8 SP AF XR Di
Tamron 18-200 mm f/3.5-6.3 AF XR (IF) Di-II
Tamron 17-35mm
Tamron 19-35mm
Tamron 70-300mm Macro
Tokina 12-24mm
Carl Zeiss Planar T* 50 mm f/1.4 (for Contax)