Advantages/Disadvantages to sending in camera along with lens for calibration?

acmatunl wrote:

I have a 50mm 1.4 that is back focusing and Canon suggested sending it in for calibration. I am wondering if it is a good idea to also send in my camera (T4i) to optimize the calibration.

I also have an 18-135 STM and a 55-250 IS II, both of which focus accurately, but I'm wondering if sending in the camera will help/hurt how it focuses with those other lenses.

If it matters, the 50mm 1.4 is the only thing still under warranty, and the T4i is my only camera body.

Any thoughts on what would be the best course of action.

Thanks for your responses!

It is a good idea to send in the camera along with the lenses.

Camera bodies can also be out of tune.

With my 30D i sent in all my lenses and body. It turned out that the best lens (on that camera) was out of spec- simply because the camera had a compensating error.

At that point i had 3 lenses, the 70-200 2.8 IS which i thought back focused, the 50mm 1.4 which i struggled getting good results with (hard to pinpoint), and the 17-85 IS which i thought was OK.

As it turned out, the 17-85 IS needed calibration the most along with the body. Since they all were within the warranty period, canon adjusted the camera and all the lenses to the camera (even though at least the 50 1-4 were within specc. In the end everything worked much better than before. The only cost i had was getting to and from the service center and waiting a couple of days w/o camera.

Now if everything is within specc our out of warranty, you might have to pay for the service. IMO it will likely be worth it if they need calibration.

-Yngve