The highest quality is RAW. Use the software that Canon supplies to improve the sharpness and such and convert the file to TIFF or JPEG. I agree though with trying to shoot without having to crop for best results and using the lowest ISO possible....
The site with the 400 compared to the 100-400 has another review comparing the 70-200, with a 2X, and the 100-400 and the images from the 100-400 look a lot better than the ones shown on that link. As someone else stated what year of lens is that? ...
Go to this forum below and look at the pictures people are taking with the 2 kit lenses. I'm not saying this is the way to go because I have the 2 kit lenses and eventually want to upgrade to 1 wide zoom and a 100-400 L class lens. If you don't min...
I'd recommend this book, "Canon EOS Rebel T3i / 600D: From Snapshots to Great Shots ". It is a great tutorial and written specifically for this camera. http://www.amazon.com/gp/product/032177664X/ref=oh_details_o01_s00_i00
The software that comes with the T3i will do that for you. Just about any program will. You may want to use the software to increase the sharpness to max since may start to get hazy as you get larger.
