The camera I am using is probably not acceptable as is.
Mike, have you removed the internal IR blocking filter? Although the OP and the book cited say that this is not a requirement, I tend to believe otherwise. I really don't see how a standard digital camera is going to produce a decent usable image without removing the internal IR blocking filter. If you don't remove the internal filter then you have to do a tremendous amount of post processing of the image which destroys any hope of getting anything useful out of it.