Thank you Thomas for letting me know, I thought that my images would be saved at 11 MP but I just read that I need a Flikr Pro account to save the images at full resolution. I tried printing out the Siemens star, but I only have an A4 printer, and I don't think the size would be adequate for the test, or even the quality of the print(used laser printer). Correct me if i'm wrong. My wall shots where mixed. Some where sharper, some less and I can't figure out why they turned out that way, since i didn't move the camera, and shot with MF + mirror lock up with self timer. I browsed Photozone, and I came up on a simple test chart(the newspaper chart) for testing the lens in a post made by Klaus.
I tried to keep everything as straight as possible, I did 3 shots and picked 1 that seemed to be the best.
This is the link to the RAW file: http://www.mediafire.com/?sli3l6a82g20mkk
The RAW file is 30 MB , and you will also need to have a RAW editing program to view it.
This is the JPEG file saved in Digital photo professional (Canon RAW converter) I only tweaked Contrast:1 and Sharpness: 5(out of 10)
Jpeg quality set to Max and output resolution is 350(by default)http://www.mediafire.com/?3sk3x3gbxf58gif
I also did the centering quality test. I have provided one image that is slightly defocused, as Klaus says it is easier to spot the issue that way, and a focused image, though the two seem pretty good.
I just read the newspaper test again, and i see that i have forgotten to mark the red corners, and i wasted over an hour on the setup :/
Anyway, I think i did the best i could, and i couldn't keep all corners perfectly aligned due to the field curvature of the lens.
If the test image is not sufficient i will redo it again...