Here they are, and both with no external filters. As you predict, the 350D pic is pink. But thats exactly what I expect you see, it makes sense to me, the shaker filter on the 40D cuts off at 700nm, so the leaves are still somewhat green (the IR extended response to 700 would not make that huge a difference to green leaves, but a spike at 1100 sure would). The mod must be right, because the 40D pic here is very close to the 350D with the external UV/IR blocker. ie the UV/IR blocker has the same curve as the shaker filter, hence the same pic, it couldnt be any other way.
And....... your 40D MUST produce the same result, because the shaker filter in your cam cuts off at 700nm, the response of your internal filter past 700nm is irrelevent, the shaker filter has already blocked the IR past 700nm.
Again, I just cant see how your shaker filter is still present due to the above. Not that it matters mind you, the external filter will make the shaker filter irelavent anyway, and you can do IR photography.
I maybe wrong BTW, that wouldnt be unusual , fun trying anyway
