Quote:
Originally Posted by Kzang
Something is definitely wrong with my camera or lens. I took it in to Canon factory and they had determined that they need to realign the lens because it had shifted. Majority of my photos on the left side are out of focus.
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I'm not sure how you "took it in to the Canon factory", but, that aside, we can't tell much about the lens from the pix that you posted. To really get a good look at lens performance, take well lit pictures of a dollar bill, with your camera mounted on your tripod, mirror locked up and remote, or timed, release. Start wide open and take comparative shots in full stop increments. If it's a zoom, try all the way wide, mid-range and all the way long. Lens distortion will show up clear as day, particularly as you look at 100% crops of various areas in the image. All lenses have distortion, but this test will give a clear idea of the lens' performance at various setting.
Don't forget to use Digital Lens Optimization during Raw conversion to automatically correct of geometric lens distortions, chromatic aberration, vignetting, etc. at every focal length and every aperture. DLO is a module include in Digital Photo Professional, that ships with every Canon dslr.
Dave