Quote:
Originally Posted by Bassnut
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.
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I don't believe the shaker filter (filter 1, low pass) has the same curve as a UV/IR block filter maybe just UV, my guess is it spikes back up at 1100nm or even maybe before that. christians graph stops at 700nm. I don't think both filters (1 and 2) cuts all the IR range only one of them and that is filter 2.
brain is starting to hurt now LOL
