Sending a Lens in for calibration & what have you...

I sent my 17-40 in because I thought it was soft on the long end. They returned it simply saying the best focus test had passed. They didn't even open it up because a plack speck inside was still there.

I have since accepted that the lens is best wide open. And, more importantly, I've managed to get some sharp shots at 40mm. It's all dependent on the light.

I've sent several lenses in for calibration. Mostly they've come back improved. When they haven't I've sent them in along with the body and that has always worked.
Of note both times that they've ended up adjusting the body the body in question did find in the normal range but had trouble focusing telephoto lenses and both times the camera came back "focus adjusted in telephoto range". Don't have a clue what that means but it worked.

mxwphoto wrote in post #2166156
It's really interesting to see people getting sub-par lenses from retail. Hopefully, it's all isolated incidents. Guess Canon's QC needs some freshening up. That or whoever handles the packages does so roughly.

You figure for the prices they charge, you figure QA would be top notch.

Yup... especially since even their trucks are pneumatic padded for a "smooth ride" for their products. Everything here except some QA seems good.