Hello folks. I've done my homework and I need your advice. I ordered the T1i and should get it next Thursday. I opted for the kit lens (EF-S 18-55mm f/3.5-5.6 IS) to practice with until I can save up for a better lens. On lenses, I've been shopping around and looking at 1) Canon EF 70-200mm f/2.8L IS USM AF, and 2) Cannon EF 24-105mm f/4L IS USM AF. I think I want to buy both eventually, 1) for outdoor shoots, and 2) for indoor and ?? Is #2 an all around type of lens that would be for indoor shooting only, or would it be for outdoors and indoors? Can one capture a subject at a decent distance with #2 out of doors? Do you think it would be a decent lens for outdoors and something to get by with until I get #1? I still need one for indoors so I'm not sure what to do yet. Thanks for listening. P.S. I'm also confused about aperture and light, and I am incredibly embarrassed about asking this, but can you please verify? The smaller the hole results in a larger number (i.e., f/4) and the narrower the aperture; and then the larger the hole results in a smaller number (i.e., f/2.8) thus a wider aperture? But if you have a smaller fixed aperture like say f/4 rather than f/2.8, then you can compensate by decreasing the shutter speed? (I understand that the larger the aperture the better, thus more control over how much light you use.) I think I understand, I am just looking for verification. Thank you.