A Canon DSLR camera has an IR-blocking filter that has to be removed before the camera allows us to obtain data similar to the B,V, VE1, VE2 we wish to have. It is evidently complex to remove the IR filter form a Canon body - lots of small screws, unbending of glued bits and fragile parts everywhere.
An alternative is the Sigma SD10 camera with the Foveon sensor. The removal of the IR filter from a Sigma SD10 is trivial - one finger can pop the filter out in a second. The SD10 costs about 180 UKP (body only) while the SD15 costs 590 UKP.