Yesterday I made a huge step for myself by buying the Canon EOS 400D with the 18-55 kitlens, my first dSLR after I used (and will continue using) the Fuji S9500 for half a year. My first impression of the camera is: what a speed compared to the Fuji, suddenly I can take 9 pictures very fast while with the Fuji I had to wait 10 seconds to take a picture! When in the shop I told the salesman I wanted a zoomlens with the camera and told him I saw the Canon EF 70-200mm f/2.8L IS USM he was very surprised and told me it was better to use such a lens on a 30D otherwise it was like putting a body on a lens instead of a lens on a body. Now I wonder, is this such a strange combination? They didn't have that lens, but they did have a Canon EF 70-200mm f/4L, which I held in my hand on a 400D body and although the balance went to the front I didn't find it that hard to hold. The salesman also added that it would be a problem on a tripod, is this true? Because while searching here on TPF I saw several topics with people having a 400D and wanted to buy such a lens. I'm still considering either the Canon EF 70-200mm f/2.8L IS USM or the Canon EF 100-400mm f/4.5-5.6L IS USM and waiting for your replies. Another thing I noticed is after a day of some shooting I saw there was something like a piece of dust or a hair visible through the viewfinder, but it doesn't show up on the pictures, so it's not on the lens or sensor, but it is annoyingly visible, anybody has an idea how to remove it from where it is (mirror? vewfinder?)? THNX in advance!