alright i want three lenses (eventually):

1: medium range zoom lens, I will have a tamron with my Rebel XTI.
2: i want a high power telephoto lens, so that I can take photos of the other side of the cliff edge of Yellowstone grand canyon next time I am there, with the magnification so high it looks like I was standing next to it. i don't care too much about things moving quickly in low light I am almost never in those conditions. My telescope can outperform every telephoto lens in existence, but I don't wanna bring that big old thing over for every photoshoot xDDD. Can a telephoto lens also shoot tiny things from a long way away, and fill the whole field of view with that?

3: I want a macro lens, that can magnify tiny flowers so that they fill the entire field of view of a Digital Rebel XTI, and produce these flowers in sharp focus. same deal with other tiny objects, shot up close. Or does an extension tube fulfill this task better?

please tell me a canon lens and a third party lens, that can do such things.

thanks very much