I recently purchased a used 20D and am having it converted by Life Pixels to deep B&W IR. Someplace in some forum some time ago I saw a list of which EF and EF-S lenses work well for IR. I have a 17-40L, a 28-105L, a 100 micro and a 35 1.4L I use on my 5D. I am considering the 17-85 for the 20D if I need to buy a separate lens. I remember that some do not do well because they have IR hot spots. I have searched many of the forums and cannot find this list. Can someone give me a link to the list or just copy it to a reply please.