IS or no IS?

[J.R.]

While I'm in favour of IS, I've just read from another poster that IS can affect bokeh

http://www.canonrumors.com/forum/index.php?topic=12818.msg230053#msg230053

while I've put a parallel question in the relevant post but it seemed right to put the question here also - is this correct?

[Plamen]

While I'm in favour of IS, I've just read from another poster that IS can affect bokeh

http://www.canonrumors.com/forum/index.php?topic=12818.msg230053#msg230053

while I've put a parallel question in the relevant post but it seemed right to put the question here also - is this correct?

If the IS elements are so decentered at the moment of the shot, to affect the bokeh, this means that without IS, you whole shot would be bokeh only.  Not to mention that you can always turn the IS off.

On the other hand, the IS poses design restrictions, and they might affect the bokeh.

[J.R.]

While I'm in favour of IS, I've just read from another poster that IS can affect bokeh

http://www.canonrumors.com/forum/index.php?topic=12818.msg230053#msg230053

while I've put a parallel question in the relevant post but it seemed right to put the question here also - is this correct?

If the IS elements are so decentered at the moment of the shot, to affect the bokeh, this means that without IS, you whole shot would be bokeh only.  Not to mention that you can always turn the IS off.

On the other hand, the IS poses design restrictions, and they might affect the bokeh.

The biggest reason I was surprised by this statement is because I've heard most people say that they never turn it off ... Sounds odd if there is a possibility that your IQ can be compromised