Canon XSi (450D) and Tokina 12-24mm Lens ( Focus issue )

Hello,

I know this is really old equipment, so old most of you might not even be familiar with it but I still use it because it is sufficient for most of my needs.

I use a Canon Rebel XSi 450D which produces outstanding results with the kit lens 18-55mm.

Because I do mostly street photography I wanted a wider lens and I purchase a mint like new condition Tokina 12-24mm wide angle lens after reading endless good reviews about this lens.

But ever since I got it, I can not manage to get a good sharp shot, it almost appears as if the lens diminished the camera resolution, very disappointing. I have always read that wide angle lens, they so wide that the whole frame is almost always in focus, sharp, but not in my case.

I want to avoid that taught that I got screwed with a defective lens that needs to be aligned and calibrated.

So...

Any ideas of why these could be happening ?

Could it be me that is not using the proper techniques to breath and hold the camera while shooting ?

Any pointers would be welcome.

Thanks in advance.

CaNik wrote:

...

I want to avoid the thought that I got screwed with a defective lens that needs to be aligned and calibrated.

...

Could it be me that is not using the proper techniques to breath and hold the camera while shooting ?

Posting some sample shots with the EXIF and your AF settings and intended target would help to diagnose whether it's the lens or your technique.