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You would need an fd to eos adapter to use it on your t2i, but the only adapters available for that have glass in them, and it degrades the sharpness of the lens by a lot, i wouldn't buy it if i were you..
-depth of field refers to how much of your image is in focus. you either have a 'deep' depth of field, where a lot is in focus, or you have a 'shallow' depth of field, which is the look you are going for. strong doesn't communicate what you are describing as well as deep or shallow does.
-don't use shallow depth of field too much. it is incredibly fun to play with and looks cool, but using it in almost every shot looks very amateur. use it as a tool to strengthen your image, and understand how it changes the way the audience views your image.
and i agree, however i wouldn't be using shallow DOF for skiing or anything with lots of movement. Im currently working on a few side projects that involve lots of close up with nice pans and static shots, which i find looks great with shallow dof.