Canon 50D AI Servo - Help!!!

I was shooting some wake boarding pictures with my old 1DsII and new 50D.
Taking picture with the same lens (100-400mm) and the same setting.
Two different result.
Why is my newer 50 not getting sharp focus?
Am I doing something wrong? or am I a bad photographer?
Any help will be appreciated.
Thanks in advance. ^^

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Same quality of JPEG. I've got a 50D with 70-200f/2.8L IS and no problems.

You might try calibrating your lens to the 50D using the micro adjust process.

Yes I had the same problem until I did the mirco focus

All but two of my lenses had to be calibrated to my Mk III. Frustrating that it has to be done with such expensive equipment but am glad the functionality to do it is built into the camera.

It is worth the time to do it. Hope it fixes your problem.

My real suggestion is stick with the DsII. With lots of light like in this shot, I can't imagine the 50D will ever live up to it no matter how calibrated the lenses are.

Big K wrote in post #7738325
You might try calibrating your lens to the 50D using the micro adjust process.

I have taken some bird pics and some other long zoom pics with lens before and it came out fine.
Is 50D's AI Servo not as good as 1DsII?
1DsII is fairly old system and I thought 50D would do better.
I might be a bad photographer but I admit... I am little bit disappointed...

I use the 50d for sports shooting all of the time and would not be surprised if the problem had more to do with your focal point. I do know that the answer is not always to use a theoretically better camera. The micro adjust also sounds worth it to me.

yuribox wrote in post #7739417
Is 50D's AI Servo not as good as 1DsII?
1DsII is fairly old system and I thought 50D would do better.
I might be a bad photographer but I admit... I am little bit disappointed...

1dsMkII might be old but the AF system is much better than xxD series. I would take 1dsMk2 over 50d anytime.

I'm having the same issues with my 50.
Can someone explain alittle bit on this micro adjust/focus?
Is is something you can do on your own? Or have to send it in?
is it hard to do if you can do it on your own?
~~~~~~~~~~~~~~~

Did a little research on it.. might be over my head?

bobbyz wrote in post #7741650
1dsMkII might be old but the AF system is much better than xxD series. I would take 1dsMk2 over 50d anytime.

+1

dmmiller wrote in post #7741750
I'm having the same issues with my 50.
Can someone explain alittle bit on this micro adjust/focus?
Is is something you can do on your own? Or have to send it in?
is it hard to do if you can do it on your own?

It is functionality that is built into the camera. Your manual will have good instructions on how to find it via the menus.

The process for making the changes is very easy. The tough part is getting a target set up so you can effectively identify the effects of each change you make. I don't think I can do a very good job of putting it into words.

Here is a link to a website of a company that makes a targeting system for use with the micro adjust. If you watch the videos it will give you a good overview of how you make the changes. The video links are on this page.

http://www.rawworkflow​.com/lensalign/

I did buy one of these devices and it works pefectly. A bit pricy but very effective.

thanks Kevin

Nice explanation of the micro adjust feature here:

https://photography-on-the.net/forum/showthre​ad.php?t=679096