"Only lenses that do not fit the D series are non L's anyhow I think.  Not sure if they make a L EF-S lens."

Hi armalite

No maybe I am reading you wrong here the only lens that will not fit the D series are the EFS range... To clarify this to avoid confusion: 

The "S" in EF-S stands for "short back focus", which means that the rear element of the lens is closer to the image sensor than on regular 35 m Cameras The proximity of the rear element to the image sensor greatly enhances the possibilities for wide angle and very wide angle lens, enabling them to be made smaller, lighter (containing less glass), faster (larger aperture) and less expensive. Most current Canon EF-S lenses are wide angle. The EFS Macro is poor quality, and recent tests seem to prove this.. However if you own one of the cameras that will fitan EFS lens they offer great value for money and the faster and lighter design are the main selling points, if you cant go to L glass, but bear in mind at a future date if you upgrade to a D series or the 5D you will not be able to use them.. Jim has given an accurate list of the cameras that are able to use this mount.

EF-S lenses, however, can not be used on EF mount cameras and Canon designers have taken steps to ensure it is physically impossible to mount EF-S lenses in this way. This is because the increased proximity of the lens to the sensor means that on full-frame sensor or 35mm film EF cameras the lens itself would obstruct the mirror's movement and cause damage to the lens and/or camera. An additional reason is that the lenses produce a smaller image circle of even illumination (circle of no vignetting).

The 10D and Earlier cameras D30 D60  share the EF-only mount with the full frame EOS camera bodies, despite having a smaller sensor and therefore a smaller mirror.  The mirrors on these cameras are larger then those models outlined by Jim.. And indeed the mirrors on the 2OD etc had to be redesigned in order to accomodate this, moving back in a different way with some increased noise, and less bright viewfinder.. Several people have successfully mounted the 18-55 EF-S kit lens on 10D cameras by modifying the mount on the lens, with successful results. However, attempting this on full frame Canon EF mount cameras would cause the mirror to collide with the rear lens element and potentially destroy the lens and/or camera. So be warned!!  I know that the use of an extension tube may also work, but this would limit the infinity focus.. I would not recommend you attempt the above modification unless you fully understand what to do..

Danny O'Byrne  http://www.digitalartzone.co.uk/

"All the technique in the world doesn't compensate for the inability to notice" Eliott Erwitt