urrrrgghhhh, this is not helping me NOT buying this lens.... great shots and advice....
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All of these are very good points and interesting arguments....
I think if i were to start photography again, i would not go down the same path i did, but would buy an older second hand camera and a good lens. This thread is an argument for doing just that! To all the "what should i buy" guys out there... pick up a used 5D I, and a 50mm instead of the newest XXXD kit...
I've been saying this exact thing to everyone who asks me what camera is best to start seriously into photography. You can grow with a 5Dc, study with it and eventually make money with it. It still makes good files in all its ISO ranges in my tastes.
If anyone on this thread would like to contribute photos to the 5Dc thread under the camera bodies section, it would be nice to see more photos from it.
I thought that in the 450D the AA + dust removal where a singular, separate, unit to the high-pass (it is a high-pass right?), though your wisdom being what it is i will definitely re-check. Does that mean that even removing the IR-cut would abolish the dust removal system (DRS), or only once the AA filter is removed will the DRS be abolished?
Sorry - you're right. On the 450D, the horizontal low pass filter is the only thing in the vibrating part, so you can leave that in place. However, the IR cut filter is sandwiched with the 1/4-wave plate (Canon calls that a phaser layer) and the vertical low pass filter. (It's low-pass, BTW - the AA filter is aka OLPF = optical low-pass filter.) So, you can remove the IR filter and leave the dust removal intact.
Note that since the IR cut filter is not separable from the 1/4-wave plate and vertical low-pass filtter, by removing the IR filter, you're also removing half of the AA filter, giving your camera astigmatism (the horizontal resolution will still be reduced, the vertical resolution will not).
I'm looking into getting the IR filter removed....
...but am also considering removing the AA filter too (a 450DE one might say). However this would remove the dust-removal feature.... anyone done this? was sensor dust then a problem?
From the diagrams I've seen, it appears that the IR cut filter and the horizontal part of the AA filter (along with the 1/4-wave plate) are all stacked together in the assembly that is piezoelectrically vibrated for 'sensor cleaning'.
I'd vote for the 15-85. It is a great lens.
I guess i will start saving.... by the time i have enough tucked away for the version II, i might have managed to persuade my wife it is necessary!
I too am saving up for the 300 f/2.8 II. The purchase will be funded in part by the sale of the 100-400. Not too sure though that I'll try to persuade my wife though ... I risk getting whacked over the head with one of the white lenses if I'm not careful ... this is one hell of a hobby!