Hi all. I was reading on another forum and come across this quote. "As the 70-200f/4L lens is an EF not an EF-S it will be subject to the 1.6 crop factor of the 300D ... effectively meaning 112-320mm. Keep in mind that this is a crop factor, not a magnification factor. This means that at 200mm the lens would have the same field of view as a 320mm lens." Does this mean that EF-S lenses such as the 17-85 f/4-5.6 IS USM lens wont be affected by the 1.6x crop factor? Cheers!