Efke may look the same but it doesn't SHOOT the same...

The Efke 820c in 35mm and 120 gives a remarkably similar IR effect to Kodak's HIE when shot through an 092 or 072 infrared cut-off filter. Even though it has an anti-halation layer, the highlights halate and glow just like HIE when I've tested the film. The film is most dissimilar to HIE in it's sensitivity and speed. A red filter is mostly useless, and does not enhance the IR effect. The Efke 820c speed is very slow, ASA 1 (4 seconds at f8 in sunlight) in the same developer I was using for HIE to get ASA 40. So, no looking through the lens and handholding without a tripod. I have side-by-side tests on my Flickr page if you want to see the difference.
http://www.flickr.com/photos/schafphoto/